The powerful function of smart phone is indescribable. It greatly facilitates today's life. Now with mobile phone, it is convenient for the contact between friends. When under pressure, you can watch a video to ease your mood. You don't need to carry cash when you go out, and you can brush your face directly without mobile phone. However, smart phone also has many disadvantages. Mobile game will waste a lot of valuable learning time for students Let the work of people increasingly depressed. Watching electronic screen for a long time can induce many diseases. The emergence of smart phones also reduces people's emotional communication in reality.