diff --git a/crates/erp-workflow/src/engine/executor.rs b/crates/erp-workflow/src/engine/executor.rs
index 3fe4f88..3b7d426 100644
--- a/crates/erp-workflow/src/engine/executor.rs
+++ b/crates/erp-workflow/src/engine/executor.rs
@@ -245,8 +245,14 @@ impl FlowExecutor {
                 )
                 .await
             }
+            NodeType::ServiceTask => {
+                // ServiceTask 尚未实现：无法自动执行服务调用，直接报错
+                return Err(WorkflowError::Validation(
+                    format!("ServiceTask ({}) 尚未实现，流程无法继续", node.name),
+                ));
+            }
             _ => {
-                // UserTask / ServiceTask / 网关（分支）等：创建活跃 token
+                // UserTask / 网关（分支）等：创建活跃 token
                 let new_token_id = Uuid::now_v7();
                 let now = Utc::now();