diff --git a/src/chart/sankey/SankeySeries.js b/src/chart/sankey/SankeySeries.js
index 9feaf3e601..05abf323ac 100644
--- a/src/chart/sankey/SankeySeries.js
+++ b/src/chart/sankey/SankeySeries.js
@@ -138,6 +138,17 @@ var SankeySeries = SeriesModel.extend({
         }
     },
 
+    // Override Series.getDataParams()
+    getDataParams: function (dataIndex, dataType) {
+        var params = SankeySeries.superCall(this, 'getDataParams', dataIndex, dataType);
+        if (params.value == null && dataType === 'node') {
+            var node = this.getGraph().getNodeByIndex(dataIndex);
+            var nodeValue = node.getLayout().value;
+            params.value = nodeValue;
+        }
+        return params;
+    },
+
     defaultOption: {
         zlevel: 0,
         z: 2,
diff --git a/test/sankey-vertical.html b/test/sankey-vertical.html
index f28731ff9a..6962a36bf1 100644
--- a/test/sankey-vertical.html
+++ b/test/sankey-vertical.html
@@ -173,7 +173,10 @@
                     color: ['#67001f', '#b2182b', '#d6604d', '#f4a582', '#fddbc7', '#d1e5f0', '#92c5de', '#4393c3', '#2166ac', '#053061'],
                     tooltip: {
                         trigger: 'item',
-                        triggerOn: 'mousemove'
+                        triggerOn: 'mousemove',
+                        formatter: function (params) {
+                            return params.name + ': ' + params.value;
+                        }
                     },
                     animation: false,
                     series: [