diff --git a/api/src/main/java/org/tron/common/logsfilter/trigger/BlockLogTrigger.java b/api/src/main/java/org/tron/common/logsfilter/trigger/BlockLogTrigger.java
index 1b9cc9c..b7bdb6d 100644
--- a/api/src/main/java/org/tron/common/logsfilter/trigger/BlockLogTrigger.java
+++ b/api/src/main/java/org/tron/common/logsfilter/trigger/BlockLogTrigger.java
@@ -36,6 +36,10 @@ public class BlockLogTrigger extends Trigger {
   @Setter
   private long witnessPayPerBlock;
 
+  @Getter
+  @Setter
+  private String parentHash;
+
   @Getter
   @Setter
   Map<String, Long> witnessMap = new HashMap<>();
@@ -63,6 +67,8 @@ public String toString() {
       .append(witnessPayPerBlock)
       .append(", witnessMap: ")
       .append(witnessMap)
+      .append(", parentHash: ")
+      .append(parentHash)
       .toString();
   }
 }