diff --git a/README.md b/README.md
index 2dd108c..bee5196 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,12 @@ Once you use external session store, session is strong dependent on your externa
 
 Support all configurations in [koa-session](https://github.com/koajs/session).
 
+* logValue
+
+```
+Support not to print the session value when session event trigger log. Default to be true.
+```
+
 [View the default configurations](https://github.com/eggjs/egg-session/blob/master/config/config.default.js)
 
 ## Questions & Suggestions
diff --git a/app.js b/app.js
index 91da4b6..d40c00a 100644
--- a/app.js
+++ b/app.js
@@ -11,9 +11,9 @@ module.exports = function(app) {
     ctx.coreLogger.warn('[session][missed] key(%s)', key);
   });
   app.on('session:expired', ({ ctx, key, value }) => {
-    ctx.coreLogger.warn('[session][expired] key(%s) value(%j)', key, value);
+    ctx.coreLogger.warn('[session][expired] key(%s) value(%j)', key, app.config.session.logValue ? value : '');
   });
   app.on('session:invalid', ({ ctx, key, value }) => {
-    ctx.coreLogger.warn('[session][invalid] key(%s) value(%j)', key, value);
+    ctx.coreLogger.warn('[session][invalid] key(%s) value(%j)', key, app.config.session.logValue ? value : '');
   });
 };
diff --git a/config/config.default.js b/config/config.default.js
index fca7223..f445487 100644
--- a/config/config.default.js
+++ b/config/config.default.js
@@ -6,4 +6,5 @@ exports.session = {
   httpOnly: true,
   encrypt: true,
   // sameSite: null,
+  logValue: true,
 };
diff --git a/test/app/middleware/session.test.js b/test/app/middleware/session.test.js
index 6b49df1..82f8969 100644
--- a/test/app/middleware/session.test.js
+++ b/test/app/middleware/session.test.js
@@ -92,6 +92,83 @@ describe('test/app/middlewares/session.test.js', () => {
     });
   });
 
+  describe('logValue', () => {
+    before(() => {
+      app = mm.app({ baseDir: 'logValue-false-session' });
+      return app.ready();
+    });
+    beforeEach(() => {
+      agent = request.agent(app.callback());
+      app.mockLog();
+    });
+    after(() => app.close());
+
+    it('when logValue is true, should log the session value', async () => {
+      let cookie;
+      app.mockLog();
+      mm(app.config.session, 'logValue', true);
+
+      await agent
+        .get('/maxAge?maxAge=100')
+        .expect(200)
+        .expect(res => {
+          cookie = res.headers['set-cookie'].join(';');
+        });
+
+      await sleep(200);
+
+      await request(app.callback())
+        .get('/get')
+        .set('cookie', cookie)
+        .expect(200)
+        .expect({});
+      app.notExpectLog('[session][expired] key(undefined) value("")', 'coreLogger');
+    });
+
+    it('when logValue is false, should not log the session value', async () => {
+      mm(app.config.session, 'logValue', false);
+      app.mockLog();
+      let cookie;
+
+      await agent
+        .get('/maxAge?maxAge=100')
+        .expect(200)
+        .expect(res => {
+          cookie = res.headers['set-cookie'].join(';');
+        });
+
+      await sleep(200);
+
+      await request(app.callback())
+        .get('/get')
+        .set('cookie', cookie)
+        .expect(200)
+        .expect({});
+
+      await sleep(1000);
+
+      app.expectLog('[session][expired] key(undefined) value("")', 'coreLogger');
+    });
+
+    it.only('when logValue is false, valid false, should not log the session value', async () => {
+      mm(app.config.session, 'logValue', false);
+      mm(app.config.session, 'valid', () => false);
+      app.mockLog();
+
+      await agent
+        .get('/set?foo=bar')
+        .expect(200)
+        .expect({ foo: 'bar' });
+
+      await agent
+        .get('/get');
+
+      await sleep(1000);
+
+      app.expectLog('[session][invalid] key(undefined) value("")', 'coreLogger');
+    });
+  });
+
   describe('session maxage', () => {
     before(() => {
       app = mm.app({ baseDir: 'session-maxage-session' });
diff --git a/test/fixtures/logValue-false-session/app/controller/home.js b/test/fixtures/logValue-false-session/app/controller/home.js
new file mode 100644
index 0000000..b122fac
--- /dev/null
+++ b/test/fixtures/logValue-false-session/app/controller/home.js
@@ -0,0 +1,25 @@
+'use strict';
+
+exports.get = function* (ctx) {
+  ctx.body = ctx.session;
+};
+
+exports.set = function* (ctx) {
+  ctx.session = ctx.query;
+  ctx.body = ctx.session;
+};
+
+exports.setKey = function* (ctx) {
+  ctx.session.key = ctx.query.key;
+  ctx.body = ctx.session;
+};
+
+exports.remove = function* (ctx) {
+  ctx.session = null;
+  ctx.body = ctx.session;
+};
+
+exports.maxAge = function* (ctx) {
+  ctx.session.maxAge = Number(this.query.maxAge);
+  ctx.body = ctx.session;
+};
diff --git a/test/fixtures/logValue-false-session/app/router.js b/test/fixtures/logValue-false-session/app/router.js
new file mode 100644
index 0000000..d5938ed
--- /dev/null
+++ b/test/fixtures/logValue-false-session/app/router.js
@@ -0,0 +1,9 @@
+'use strict';
+
+module.exports = function(app) {
+  app.get('/get', 'home.get');
+  app.get('/set', 'home.set');
+  app.get('/setKey', 'home.setKey');
+  app.get('/remove', 'home.remove');
+  app.get('/maxAge', 'home.maxAge');
+};
diff --git a/test/fixtures/logValue-false-session/config/config.default.js b/test/fixtures/logValue-false-session/config/config.default.js
new file mode 100644
index 0000000..7aee4cf
--- /dev/null
+++ b/test/fixtures/logValue-false-session/config/config.default.js
@@ -0,0 +1,6 @@
+'use strict';
+
+exports.keys = 'keys';
+exports.session = {
+  logValue: false,
+};
diff --git a/test/fixtures/logValue-false-session/package.json b/test/fixtures/logValue-false-session/package.json
new file mode 100644
index 0000000..217cbd6
--- /dev/null
+++ b/test/fixtures/logValue-false-session/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "logvalue-false-session"
+}