diff --git a/app/actions/plan.py b/app/actions/plan.py
index 05dd171..e6b1ef7 100644
--- a/app/actions/plan.py
+++ b/app/actions/plan.py
@@ -12,8 +12,11 @@ from app.schemas.actions import (
     MoveAction,
     ResizeAction,
     UpdateAction,
+    UpdateCanvasAction,
 )
+from app.schemas.component_resource import ComponentDefinition
 from app.schemas.screen import Screen, ScreenNode
+from app.schemas.screen_plan import PlanComponent
 
 
 def plan_block_reason(state: QueryState) -> str | None:
@@ -22,8 +25,6 @@ def plan_block_reason(state: QueryState) -> str | None:
     resources = state.get("component_resources")
     if state["requirement"].needs_clarification:
         return "需求尚未澄清，不能生成规划动作"
-    if plan.canvas_changes:
-        return "规划中的画布修改尚未接入，当前仅支持无需规划的画布修改"
     if plan.resource_needs:
         return "规划仍有待获取资源，不能直接生成动作"
     additions = [item for item in plan.components if item.disposition == "add"]
@@ -33,8 +34,8 @@ def plan_block_reason(state: QueryState) -> str | None:
     modifications = {
         item.target_id: item for item in plan.components if item.disposition == "modify"
     }
-    if not additions and not modifications and not removals:
-        return "规划未包含可执行的新增、调整或删除组件"
+    if not additions and not modifications and not removals and not plan.canvas_changes:
+        return "规划未包含可执行的组件或画布修改"
     if additions and (resources is None or resources.status != "resolved"):
         return "组件目录尚未就绪"
     supported = {item.type for item in resources.components} if resources else set()
@@ -54,6 +55,7 @@ def plan_block_reason(state: QueryState) -> str | None:
     # 已有目标的修改诉求不能通过 keep 或遗漏目标绕过
     supported_operations = {"move", "resize", "update", "restyle", "reflow", "layout"}
     changes = state["requirement"].changes
+
     # 删除必须逐个目标获得明确授权，整体布局调整不隐含删除权限
     allowed_removals = {
         target
@@ -61,10 +63,19 @@ def plan_block_reason(state: QueryState) -> str | None:
         if change.target_scope == "nodes" and change.operation == "delete"
         for target in change.target_ids
     }
+
     if removals != allowed_removals:
         return "规划删除目标与需求不一致，不能遗漏或扩大删除范围"
+
     for change in changes:
-        if change.target_scope == "screen" and change.operation == "add":
+        if change.target_scope == "canvas" and change.operation in {
+            "update",
+            "resize",
+            "update_canvas",
+        }:
+            if not plan.canvas_changes:
+                return "规划遗漏画布修改需求"
+        elif change.target_scope == "screen" and change.operation == "add":
             if not additions:
                 return "规划遗漏新增需求"
         elif change.target_scope == "nodes" and change.operation == "delete":
@@ -79,6 +90,7 @@ def plan_block_reason(state: QueryState) -> str | None:
                 return "规划遗漏需要调整的组件"
         else:
             return "需求包含未支持的操作，当前不能只执行部分规划"
+
     if (
         modifications
         and changes
@@ -140,111 +152,167 @@ def assemble_plan_actions(state: QueryState, batch: ActionBatch) -> ActionBatch:
     return result
 
 
+def _validate_canvas_action(
+    action: UpdateCanvasAction, planned_fields: set[str], covered_fields: set[str]
+) -> str | None:
+    """检查画布字段范围，通过后记录已覆盖字段，最终值在执行后检查"""
+    if extra := set(action.properties) - planned_fields:
+        return f"不能修改规划外的画布字段: {sorted(extra)}"
+    covered_fields.update(action.properties)
+    return None
+
+
+def _validate_delete_action(
+    action: DeleteAction, planned_ids: set[str], removed_ids: set[str]
+) -> str | None:
+    """只允许删除 remove 目标，通过后记录目标以防重复删除"""
+    if action.target_id not in planned_ids:
+        return f"不能删除非 remove 规划目标: {action.target_id}"
+    if action.target_id in removed_ids:
+        return f"不能重复删除组件: {action.target_id}"
+    removed_ids.add(action.target_id)
+    return None
+
+
+def _validate_modify_action(
+    action: MoveAction | ResizeAction | UpdateAction,
+    planned: dict[str, PlanComponent],
+    modified_ids: set[str],
+) -> str | None:
+    """只允许调整 modify 目标，属性更新还需规划中有设计要求"""
+    if action.target_id not in planned:
+        return f"不能修改保留或未提及的组件: {action.target_id}"
+    if isinstance(action, UpdateAction) and not planned[action.target_id].design:
+        return f"规划未要求修改属性: {action.target_id}"
+    modified_ids.add(action.target_id)
+    return None
+
+
+def _validate_add_action(
+    action: AddAction,
+    planned: dict[str, PlanComponent],
+    materials: dict[str, ComponentDefinition],
+    existing_ids: set[str],
+    seen_plan_ids: set[str],
+) -> str | None:
+    """检查新增规划关联、ID、物料类型、布局及数据标记"""
+    if action.plan_id not in planned:
+        return f"动作未关联有效的新增规划: {action.plan_id}"
+    if action.plan_id in seen_plan_ids:
+        return f"同一规划组件不能重复新增: {action.plan_id}"
+    if action.node.id in existing_ids:
+        return f"新增组件不能复用原有 ID: {action.node.id}"
+
+    # 关联有效即记录出现，后续配置错误单独报告，不再重复报遗漏
+    seen_plan_ids.add(action.plan_id)
+    item = planned[action.plan_id]
+    material = materials.get(action.component_key)
+    if (
+        material is None
+        or material.type != item.component_type
+        or action.node.type != item.component_type
+    ):
+        return "新增节点类型、物料和规划类型不一致"
+    if item.layout is not None and action.node.layout != item.layout:
+        return f"新增布局与规划不一致: {item.plan_id}"
+    if action.sample_data != material.sample_data:
+        return "示例数据标记与物料不一致"
+    if action.node.model_extra.get("dataId"):
+        return "当前尚未接入数据绑定，不能生成 dataId"
+    return None
+
+
 def validate_plan_actions(
     state: QueryState, batch: ActionBatch
 ) -> list[ActionValidationError]:
     """检查动作是否覆盖规划，禁止修改 keep 或未提及的组件"""
+    # 先检查规划是否可执行，不支持时直接返回原因
     if reason := plan_block_reason(state):
         return [ActionValidationError(code="scope_error", message=reason)]
+    # 新增动作通过 plan_id 查找对应规划
     expected = {
         item.plan_id: item
         for item in state["screen_plan"].components
         if item.disposition == "add"
     }
+    # 修改动作通过已有组件 ID 查找对应规划
     modifications = {
         item.target_id: item
         for item in state["screen_plan"].components
         if item.disposition == "modify"
     }
+    # 物料按 key 索引，用于核对新增组件的类型和示例数据标记
     resources = state.get("component_resources")
     materials = {item.key: item for item in resources.components} if resources else {}
-    seen = set()
-    modified = set()
+    seen: set[str] = set()  # 已关联的新增规划编号
+    modified: set[str] = set()  # 已覆盖的修改目标
+    # 只有规划标为 remove 的组件才允许删除
     removals = {
         item.target_id
         for item in state["screen_plan"].components
         if item.disposition == "remove"
     }
-    removed = set()
+    removed: set[str] = set()  # 已覆盖的删除目标
+    canvas_fields: set[str] = set()  # 已覆盖的画布字段
+    planned_canvas = state[
+        "screen_plan"
+    ].canvas_changes  # 规划要求修改的画布字段及最终值
     errors = []
+
+    # 保存原有组件 ID，防止新增组件复用已有 ID
+    existing_ids = {node.id for node in state["input_context"].screen.nodes}
+    # 按顺序校验每个动作，保留索引以便定位错误
     for index, action in enumerate(batch.actions):
-        message = None
-        if isinstance(action, DeleteAction):
-            if action.target_id not in removals:
-                message = f"不能删除非 remove 规划目标: {action.target_id}"
-            elif action.target_id in removed:
-                message = f"不能重复删除组件: {action.target_id}"
-            else:
-                removed.add(action.target_id)
-        elif not isinstance(action, AddAction):
-            if not isinstance(action, (MoveAction, ResizeAction, UpdateAction)):
-                message = "规划调整仅支持 move、resize 和 update"
-            elif action.target_id not in modifications:
-                message = f"不能修改保留或未提及的组件: {action.target_id}"
-            elif (
-                isinstance(action, UpdateAction)
-                and not modifications[action.target_id].design
-            ):
-                message = f"规划未要求修改属性: {action.target_id}"
-            else:
-                modified.add(action.target_id)
-        elif action.plan_id not in expected:
-            message = f"动作未关联有效的新增规划: {action.plan_id}"
-        elif action.plan_id in seen:
-            message = f"同一规划组件不能重复新增: {action.plan_id}"
-        elif action.node.id in {
-            node.id for node in state["input_context"].screen.nodes
-        }:
-            message = f"新增组件不能复用原有 ID: {action.node.id}"
+        if isinstance(action, UpdateCanvasAction):
+            # 检查画布字段是否超出规划，并记录已覆盖字段
+            message = _validate_canvas_action(
+                action, set(planned_canvas), canvas_fields
+            )
+        elif isinstance(action, DeleteAction):
+            # 检查删除目标是否允许、是否重复，并记录已删除目标
+            message = _validate_delete_action(action, removals, removed)
+        elif isinstance(action, AddAction):
+            # 核对新增规划、ID、物料和布局，并记录已关联的规划编号
+            message = _validate_add_action(
+                action, expected, materials, existing_ids, seen
+            )
+        elif isinstance(action, (MoveAction, ResizeAction, UpdateAction)):
+            # 检查目标是否允许修改，更新属性时还需有设计要求
+            message = _validate_modify_action(action, modifications, modified)
         else:
-            seen.add(action.plan_id)
-            item = expected[action.plan_id]
-            material = materials.get(action.component_key)
-            if (
-                material is None
-                or material.type != item.component_type
-                or action.node.type != item.component_type
-            ):
-                message = "新增节点类型、物料和规划类型不一致"
-            elif item.layout is not None and action.node.layout != item.layout:
-                message = f"新增布局与规划不一致: {item.plan_id}"
-            elif action.sample_data != material.sample_data:
-                message = "示例数据标记与物料不一致"
-            elif action.node.model_extra.get("dataId"):
-                message = "当前尚未接入数据绑定，不能生成 dataId"
+            # 未接入规划校验的动作返回错误，避免静默放行
+            message = "规划调整仅支持 move、resize 和 update"
         if message:
+            # 将错误与动作索引关联，继续收集其余动作的问题
             errors.append(
                 ActionValidationError(
                     action_index=index, code="scope_error", message=message
                 )
             )
-    if missing := set(expected) - seen:
-        errors.append(
-            ActionValidationError(
-                code="scope_error", message=f"遗漏新增规划组件: {sorted(missing)}"
+
+    # 逐条合法还不够，整批动作必须覆盖全部规划目标
+    for label, missing in (
+        ("新增规划组件", set(expected) - seen),
+        ("调整规划组件", set(modifications) - modified),
+        ("删除规划组件", removals - removed),
+        ("画布规划字段", set(planned_canvas) - canvas_fields),
+    ):
+        if missing:
+            # 遗漏属于整批动作的问题，不关联某一条动作索引
+            errors.append(
+                ActionValidationError(
+                    code="scope_error", message=f"遗漏{label}: {sorted(missing)}"
+                )
             )
-        )
-    if missing := set(modifications) - modified:
-        errors.append(
-            ActionValidationError(
-                code="scope_error", message=f"遗漏调整规划组件: {sorted(missing)}"
-            )
-        )
-    if missing := removals - removed:
-        errors.append(
-            ActionValidationError(
-                code="scope_error", message=f"遗漏删除规划组件: {sorted(missing)}"
-            )
-        )
     return errors
 
 
 def validate_plan_result(
     state: QueryState, screen: Screen
 ) -> list[ActionValidationError]:
-    """整批执行后检查已有组件的最终布局，避免动作合法但没有达到规划位置"""
+    """检查整批执行后的组件布局和画布属性是否达到规划要求"""
     nodes = {node.id: node for node in screen.nodes}
-    return [
+    errors = [
         ActionValidationError(
             code="scope_error", message=f"执行后的布局与规划不一致: {item.target_id}"
         )
@@ -263,3 +331,12 @@ def validate_plan_result(
             for key, value in item.layout.model_dump().items()
         )
     ]
+    canvas = screen.canvas.model_dump()
+    for key, value in state["screen_plan"].canvas_changes.items():
+        if key not in canvas or canvas[key] != value:
+            errors.append(
+                ActionValidationError(
+                    code="scope_error", message=f"执行后的画布属性与规划不一致: {key}"
+                )
+            )
+    return errors
diff --git a/app/processor/graph.py b/app/processor/graph.py
index 6520c21..ac0f756 100644
--- a/app/processor/graph.py
+++ b/app/processor/graph.py
@@ -194,6 +194,7 @@ def build_graph(checkpointer=None):
             ]
         )
         checkpointer = InMemorySaver(serde=serde)
+
     return workflow.compile(checkpointer=checkpointer).with_config(
         {
             "recursion_limit": max(25, 12 + 3 * max_retries),
diff --git a/app/prompt/action.py b/app/prompt/action.py
index df168fc..0080abb 100644
--- a/app/prompt/action.py
+++ b/app/prompt/action.py
@@ -59,6 +59,11 @@ def build_action_prompt(
     else:
         sections.append(PLAN_TASK_PROMPT)
         action_types = set()
+        if screen_plan.canvas_changes:
+            sections.append(
+                "## 调整画布\n将 canvas_changes 中的最终属性值转换为 update_canvas，完整覆盖且不添加其他画布字段"
+            )
+            action_types.add("update_canvas")
         if any(item.disposition == "add" for item in screen_plan.components):
             action_types.add("add")
         if any(item.disposition == "remove" for item in screen_plan.components):
diff --git a/app/prompt/planner.py b/app/prompt/planner.py
index 14a6f26..a8d8266 100644
--- a/app/prompt/planner.py
+++ b/app/prompt/planner.py
@@ -8,6 +8,7 @@ PLANNER_SYSTEM_PROMPT = """## 任务
 覆盖本次全部变更，保留约束，不重新判断意图或扩大修改范围
 
 ## 组件与布局
+canvas_changes 只填写需求范围内要修改的画布顶层字段及最终值，不填写相对变化或设计描述
 已有组件使用真实 target_id；无需改动的组件可保留或省略，省略不代表删除
 remove 仅用于需求明确指定的删除目标，不能因为重新布局而擅自移除组件
 布局未确定时写清排列关系；提供 layout 时表示最终的画布绝对坐标和尺寸，单位 px
diff --git a/app/schemas/screen_plan.py b/app/schemas/screen_plan.py
index 8c857e6..14d1b17 100644
--- a/app/schemas/screen_plan.py
+++ b/app/schemas/screen_plan.py
@@ -78,7 +78,8 @@ class ScreenPlan(ExtensibleModel):
         description="区域关系、布局安排及保留内容"
     )
     canvas_changes: JsonObject = Field(
-        default_factory=dict, description="建议的画布属性变化，为空表示不改画布"
+        default_factory=dict,
+        description="要修改的画布顶层字段及最终值，宽高为绝对值，字段整体替换，为空表示不改画布",
     )
     regions: list[PlanRegion] = Field(default_factory=list)
     components: list[PlanComponent] = Field(default_factory=list)