diff --git a/input/input_box.go b/input/input_box.go
index e1c161ec..5e1e1eaf 100644
--- a/input/input_box.go
+++ b/input/input_box.go
@@ -82,24 +82,24 @@ func (box *InputBox) buildTopology(workerIdx int) *topology.ProcessorNode {
 
 	filterBoxes := topology.BuildFilterBoxes(box.config, filter.BuildFilter)
 
+	var firstNode *topology.ProcessorNode
+	for _, b := range filterBoxes {
+		firstNode = topology.AppendProcessorsToLink(firstNode, b)
+	}
+	firstNode = topology.AppendProcessorsToLink(firstNode, outputProcessor)
+
 	// Set BelongTo
-	for i, b := range filterBoxes {
+	var node *topology.ProcessorNode
+	node = firstNode
+	for _, b := range filterBoxes {
+		node = node.Next
 		v := reflect.ValueOf(b.Filter)
 		f := v.MethodByName("SetBelongTo")
 		if f.IsValid() {
-			if i == len(filterBoxes)-1 {
-				f.Call([]reflect.Value{reflect.ValueOf(outputProcessor)})
-			} else {
-				f.Call([]reflect.Value{reflect.ValueOf(filterBoxes[i+1])})
-			}
+			f.Call([]reflect.Value{reflect.ValueOf(node)})
 		}
 	}
 
-	var firstNode *topology.ProcessorNode
-	for _, b := range filterBoxes {
-		firstNode = topology.AppendProcessorsToLink(firstNode, b)
-	}
-	firstNode = topology.AppendProcessorsToLink(firstNode, outputProcessor)
 	return firstNode
 }