n the present life, cell-phone is indispensable part in our life. With the progress of era, smart phone is becoming more common. This brings us a lot of convenient. In fact, It’s a bad impact on humans. Whenever I walking on the road, having dinner in the restaurant or taking a bus. I can saw people constantly using the phone. Including my friends. Every time, if I hang out with them, they just taking picture whole time. And upload a photo to Instagram. And the conversation is around apps, I think we don’t care about each other anymore. Seemingly their life only have internet and cell-phone. Since when, cell-phone are beginning to affect our relationship? However, not just affected relationship, most students staring at the phone during the whole lesson. It causes the students can’t focus on class. When you sleepy, if somebody send message to you at night, I think you will waken up by cell-phone ringtone. You starting reply your friends message all night. So you don’t have enough sleep. We should be sleep earlier and sleeping for 8 hours. Therefore, I will talk about overuse cell-phone has had several important effects on our life: Affect people's relationship and communication, can’t focus on anything and haven’t enough sleeping time.