| Since the emergence of Internet addiction has been concerned the concern of scholars. With the recent popularity of computer, the rate of Internet Addiction is increasing. Students used the Internet as one of the main uses of their networks is particularly closely watched. So, to achieve the health objective of the Internet, whether students need to limit time spent online, and how much online time threshold is the focus of this paper.This study used questionnaires to study. Using the difference analysis, correlation analysis and regression analysis on the impact of Internet Addiction of the relevant factors to discuss how to prevent the undergraduates of the Internet time threshold, which is for university students to provide a theoretical basis for health.Found through research and analysis:(1) Internet Addiction detection is rate of 16.5%, among them, the number of boy Internet addiction is more than girls; the proportion from freshman to junior of Internet Addiction gradually increased, when the ratio fell slightly to senior.(2) The addicts daily Internet time and time spent online per week were significantly were more than non-Internet addiction among college students.(3) The students of Internet addiction were at a lower level of mental health. Among them, forcing was the most prominent symptom of this factor; The Undergraduates of Internet addiction was with more intense loneliness, low self-esteem; Internet addiction students has the rigor of poor students, poor interpersonal relationships, and the higher nervous characteristics.(4) IAD factors regression equation has a good predictor of, and the time spent online each day has an important role.(5) Co lege students'time spent online per day within 3 hours is a security access, and college students'time spent online per week within 20 hours on the Internet for security. |