diff --git a/seatunnel-connectors-v2/connector-milvus/src/main/java/org/apache/seatunnel/connectors/seatunnel/milvus/utils/sink/MilvusSinkConverter.java b/seatunnel-connectors-v2/connector-milvus/src/main/java/org/apache/seatunnel/connectors/seatunnel/milvus/utils/sink/MilvusSinkConverter.java
index a8256ea56a9..3c059ffcb1a 100644
--- a/seatunnel-connectors-v2/connector-milvus/src/main/java/org/apache/seatunnel/connectors/seatunnel/milvus/utils/sink/MilvusSinkConverter.java
+++ b/seatunnel-connectors-v2/connector-milvus/src/main/java/org/apache/seatunnel/connectors/seatunnel/milvus/utils/sink/MilvusSinkConverter.java
@@ -36,6 +36,7 @@
 import org.apache.commons.lang3.StringUtils;
 
 import com.google.gson.Gson;
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import io.milvus.grpc.DataType;
@@ -69,7 +70,12 @@ public Object convertBySeaTunnelType(
             case STRING:
             case DATE:
                 if (isJson) {
-                    return gson.fromJson(value.toString(), JsonObject.class);
+                    JsonElement element = gson.fromJson(value.toString(), JsonElement.class);
+                    if (element.isJsonObject()) {
+                        return element.getAsJsonObject();
+                    } else {
+                        return element.toString();
+                    }
                 }
                 return value.toString();
             case FLOAT_VECTOR: