First, how to deal with college students fighting? Disputes between students in the school led to fights. If there is no serious injury, it can be negotiated through the security department in the school or through the teachers' student union and other departments. Mediation is the best way, and it is also a more suitable way for students. If the case cannot be solved, it shall be handled by the police station under its jurisdiction according to the investigation, and the handling method may also be mediation in advance or investigation by the public security organ. Disrupting public order, endangering public safety, infringing personal rights and property rights, obstructing social management, which is harmful to society and constitutes a crime in accordance with the provisions of the Criminal Law of People's Republic of China (PRC), criminal responsibility shall be investigated according to law; If it is not serious enough for criminal punishment, the public security organ shall impose administrative penalties for public security in accordance with this law. Depending on the specific case, if it constitutes a minor injury or more, it may be suspected of intentional injury, and criminal responsibility shall be investigated according to law; If it is not serious enough for criminal punishment, the public security organ shall impose administrative penalties for public security in accordance with this law. Second, what is the longest criminal detention for fighting? The date of criminal detention for fighting is generally 3 to 15. According to the provisions of the Criminal Procedure Law, if the public security organ deems it necessary to arrest a detained person, it shall submit it to the people's procuratorate for examination and approval within three days after detention. Under special circumstances, the approval time can be extended by one to four days. The people's procuratorate shall, within seven days after receiving the approval letter from the public security organ, make a decision on whether to approve or disapprove the arrest. If the people's procuratorate does not approve the arrest, the public security organ shall immediately release it after receiving the notice and promptly notify the people's procuratorate to execute it. Those who need to continue the investigation and meet the conditions of obtaining a guarantor pending trial or residential surveillance shall be granted a guarantor pending trial or residential surveillance according to law. In other words, under normal circumstances, criminal detention does not exceed 14 days. At the same time, the Criminal Procedure Law also stipulates that the time for reporting for examination and approval can be extended to 30 days for major criminal suspects who are at large, have committed crimes many times or have committed crimes in partnership. That is, under special circumstances, the period of criminal detention can be extended to 37 days. To sum up, it is against the school rules and regulations for college students to commit suicide. The school will criticize and educate the parties concerned, and give them warnings and demerits. If the fighting is serious, the police station will intervene in the investigation, which constitutes an illegal act, and the parties will be investigated for legal responsibility, detention and fines. If it causes damage to the other party, it shall also bear civil liability for compensation such as medical expenses and nursing expenses.