diff --git a/seahub/api2/endpoints/admin/statistics.py b/seahub/api2/endpoints/admin/statistics.py
index 6cf818d7d4..ff364836eb 100644
--- a/seahub/api2/endpoints/admin/statistics.py
+++ b/seahub/api2/endpoints/admin/statistics.py
@@ -85,6 +85,7 @@ class FileOperationsView(APIView):
         ops_added_dict = get_init_data(start_time, end_time)
         ops_visited_dict = get_init_data(start_time, end_time)
         ops_deleted_dict = get_init_data(start_time, end_time)
+        ops_modified_dict = get_init_data(start_time, end_time)
 
         for e in data:
             if e[1] == 'Added':
@@ -93,13 +94,16 @@ class FileOperationsView(APIView):
                 ops_visited_dict[e[0]] = e[2]
             elif e[1] == 'Deleted':
                 ops_deleted_dict[e[0]] = e[2]
+            elif e[1] == 'Modified':
+                ops_modified_dict[e[0]] = e[2]
 
         res_data = []
         for k, v in ops_added_dict.items():
             res_data.append({'datetime': datetime_to_isoformat_timestr(k), 
                          'added': v, 
                          'visited': ops_visited_dict[k], 
-                         'deleted': ops_deleted_dict[k]})
+                         'deleted': ops_deleted_dict[k],
+                         'modified': ops_modified_dict[k]})
         return Response(sorted(res_data, key=lambda x: x['datetime']))
 
 
diff --git a/seahub/templates/sysadmin/sys_statistic_file.html b/seahub/templates/sysadmin/sys_statistic_file.html
index 8d1e7bc941..4b3352d85c 100644
--- a/seahub/templates/sysadmin/sys_statistic_file.html
+++ b/seahub/templates/sysadmin/sys_statistic_file.html
@@ -140,7 +140,8 @@ function renderChart(data, group_by) {
     var labels = [],
         added = [],
         deleted = [],
-        visited = [];
+        visited = [],
+        modified = [];
 
     var item;
     var datetime_ms, datetime_str;
@@ -161,6 +162,7 @@ function renderChart(data, group_by) {
         added.push(item.added);
         deleted.push(item.deleted);
         visited.push(item.visited);
+        modified.push(item.modified);
     }
 
     var config = {
@@ -180,6 +182,12 @@ function renderChart(data, group_by) {
                     borderColor: '#57cd6b',
                     backgroundColor: '#57cd6b'
                 },
+                {
+                    label: "{% trans "Modified" context "files modified" %}",
+                    data: modified,
+                    borderColor: '#72c3fc',
+                    backgroundColor: '#72c3fc'
+                },
                 {
                     label: "{% trans "Deleted" context "files deleted" %}",
                     data: deleted,