diff --git a/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/AggregateInstruction.ts b/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/AggregateInstruction.ts
index 66423ce090..7517611809 100644
--- a/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/AggregateInstruction.ts
+++ b/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/AggregateInstruction.ts
@@ -49,7 +49,7 @@ export default class extends Instruction {
     });
 
     return {
-      result: round(options.dataType === DataTypes.DOUBLE ? Number(result) : result, 14),
+      result: round((options.dataType === DataTypes.DOUBLE ? Number(result) : result) || 0, 14),
       status: JOB_STATUS.RESOLVED,
     };
   }
diff --git a/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/__tests__/instruction.test.ts b/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/__tests__/instruction.test.ts
index b5cd69a8d6..4a3102cd1d 100644
--- a/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/__tests__/instruction.test.ts
+++ b/packages/plugins/@nocobase/plugin-workflow-aggregate/src/server/__tests__/instruction.test.ts
@@ -180,6 +180,27 @@ describe('workflow > instructions > aggregate', () => {
       expect(j2.result).toBe(0.3);
     });
 
+    it('sum null will be 0', async () => {
+      const n1 = await workflow.createNode({
+        type: 'aggregate',
+        config: {
+          aggregator: 'sum',
+          collection: 'posts',
+          params: {
+            field: 'read',
+          },
+        },
+      });
+
+      const p2 = await PostRepo.create({ values: { title: 't2' } });
+
+      await sleep(500);
+
+      const [e1] = await workflow.getExecutions();
+      const [j1] = await e1.getJobs();
+      expect(j1.result).toBe(0);
+    });
+
     it('avg', async () => {
       const n1 = await workflow.createNode({
         type: 'aggregate',