diff --git a/example/dbtest3.py b/example/dbtest3.py
new file mode 100644
index 0000000..9514f7a
--- /dev/null
+++ b/example/dbtest3.py
@@ -0,0 +1,59 @@
+import time
+curt = time.time()
+import json
+import numpy as np
+
+import dbsecmpc
+
+
+# conf写法参考Rosetta的CONFIG.json文件
+conf = {
+    "NODE_INFO": [
+        {
+            "HOST": "10.10.160.2",
+            "PORT": 44122,
+            "NODE_ID": "P0"
+        },
+        {
+            "HOST": "10.10.160.3",
+            "PORT": 42143,
+            "NODE_ID": "P1"
+        },
+        {
+            "HOST": "10.10.160.4",
+            "PORT": 53169,
+            "NODE_ID": "P2"
+        }
+    ],
+    "DATA_NODES": [
+        "P0",
+        "P1",
+        "P2"
+    ],
+    "COMPUTATION_NODES": {
+        "P0": 0,
+        "P1": 1,
+        "P2": 2
+    },
+    "RESULT_NODES": [
+        "P0",
+        "P1",
+        "P2"
+    ]
+}
+
+def main(parid):
+    np.random.seed(199)
+    colnum, rownum = 2, 100000
+    lefttable = np.random.rand(colnum * rownum)*(2**10)
+    lefttable.shape = (colnum, rownum)
+    confbuf = json.dumps(conf)
+    dbsecmpc.init(parid, confbuf)
+    s_lefttable = dbsecmpc.privateinput(["P0"], lefttable)
+    res = dbsecmpc.opvector(s_lefttable[0], s_lefttable[1], dbsecmpc.OP_ADD)
+    res = dbsecmpc.reveal(["P0"], res)
+    print(res)
+
+
+if __name__ == '__main__':
+    main(2)