Some people think that the Internet can make learning and work more efficient Some people think that the Internet makes teenagers addicted, which in turn affects their learning. I think the Internet is a double-edged sword. We must make good use of it to help teenagers learn. The computer is very convenient. With computers, you can get all kinds of information anytime, anywhere. The computer can also transmit the warmth of the world. In the network, people can chat with their relatives, and the tourists outside can also enjoy the feeling of long lost affection with their families. but,Internet addiction not only affects people's psychology, but also affects people's physical health, especially causes the autonomic nervous disorder. At the same time, due to the full attention when playing games, the body is always in a posture, the eyes stare at the display screen for a long time, which will lead to the decline of vision and other symptoms. Addicted to online games, it is easy for minors to reduce interpersonal communication, produce autistic tendencies, and even suffer from "computer autism". Therefore, the network is a double-edged sword, we must make good use of it. Let it help us learn better.