College students addicted to the Internet may bring the following harm: 1. Affects studies: College students who are addicted to the Internet may be distracted and lead to a decline in academic performance. 2. Affect social interaction: College students who are addicted to the Internet may miss social opportunities and the possibility of establishing contact with classmates, teachers, and family members will be reduced. 3. Affects physical and mental health: Long-term addiction to the Internet may lead to vision loss, insomnia, inattention, cervical vertebra disease, obese and other problems that may even affect mental health. 4. Affect career planning: College students who are addicted to the Internet may miss information and opportunities in the job market and affect career planning. Addicting to the Internet can also lead to crime, such as online fraud, online gambling, online violence, etc. Therefore, college students should be aware of the dangers of being addicted to the Internet and take active measures to prevent and reduce its harm.