diff --git a/tools/cal_pos_neg.py b/tools/cal_pos_neg.py
new file mode 100644
index 0000000000000000000000000000000000000000..8b356046f47b204f8709805a05a2cc0509a6d195
--- /dev/null
+++ b/tools/cal_pos_neg.py
@@ -0,0 +1,90 @@
+#!/usr/bin/python  
+#-*- coding:utf-8 -*-  
+############################  
+#File Name: cal_pos_neg.py
+#Author: youqiheng 
+#Mail: youqiheng@baidu.com
+#Created Time: 2018-04-15 21:59:45
+############################ 
+"""
+docstring
+"""
+
+import os
+import sys
+
+if len(sys.argv) < 2:
+    print "usage:python %s input" % (sys.argv[0])
+    sys.exit(-1)
+
+fin = file(sys.argv[1])
+pos_num = 0
+neg_num = 0
+
+score_list = []
+label_list = []
+last_query = "-1"
+
+#0       12.786960       1
+#0       -1.480890       0
+cnt = 0
+query_num = 0
+pair_num = 0
+equal_num = 0
+for line in fin:
+    cols = line.strip().split("\t")
+    cnt += 1
+    if cnt % 500000 == 0:
+        print "cnt:", cnt, 1.0 * pos_num / neg_num
+    if len(cols) != 3:
+        continue
+
+    cur_query = cols[0]
+    if cur_query != last_query:
+        query_num += 1
+        for i in xrange(0, len(score_list)):
+            for j in xrange(i + 1, len(score_list)):
+                if label_list[i] == label_list[j]:
+                    continue
+                pair_num += 1
+                if (score_list[i] - score_list[j]) * (
+                        label_list[i] - label_list[j]) < 0:
+                    neg_num += 1
+                elif (score_list[i] - score_list[j]) * (
+                        label_list[i] - label_list[j]) > 0:
+                    pos_num += 1
+                else:
+                    equal_num += 1
+        score_list = []
+        label_list = []
+
+    last_query = cur_query
+
+    label = int(cols[2])
+
+    score_list.append(round(float(cols[1]), 6))
+    label_list.append(int(cols[2]))
+
+fin.close()
+
+for i in xrange(0, len(score_list)):
+    for j in xrange(i + 1, len(score_list)):
+        if label_list[i] == label_list[j]:
+            continue
+        pair_num += 1
+        if (score_list[i] - score_list[j]) * (label_list[i] - label_list[j]
+                                              ) < 0:
+            neg_num += 1
+        elif (score_list[i] - score_list[j]) * (label_list[i] - label_list[j]
+                                                ) > 0:
+            pos_num += 1
+        else:
+            equal_num += 1
+
+if neg_num > 0:
+    print "pnr:", 1.0 * pos_num / neg_num
+    print "query_num:", query_num
+    print "pair_num:", pos_num + neg_num + equal_num, pair_num
+    print "equal_num:", equal_num
+    print "正序率：", 1.0 * pos_num / (pos_num + neg_num)
+print pos_num, neg_num