Abstract: Objective To analyze the network use and internet addiction of college students and its influencing factors. Methods Chinese Internet Addiction Scale(CIAS-R)and Mobile phone Addiction Index(MPAI)were used to investigate 364 college students with a convenient sampling questionnaire and we divided the CIAS-R total score ≥65 into the judgment indicators of Internet addiction. We also investigated the academic performance, personality characteristics, interpersonal relationship, family structure, family type and parent's occupation. Results The incidence of internet addiction among college students was 12.09%, 13.04% for males and 11.65% for females, and there was no difference between genders(χ²=0.144, P>0.05)at school. The total score of femaleCIAS-R(54.10±9.94)was significantly higher than that of male(51.42±13.11), with significant statistical difference(t=2.152, P=0.032), The results of MPAI showed total scores, withdrawal, loss of control, inefficiency, evasive factor of network addicts were significantly higher than those of non-addicts(P<0.01), and multivariate logistic regression analysis showed non-democratic family types(OR=1.491, 95%CI=1.038-2.142)and poor Academic achievement(OR=2.472, 95%CI=1.467-4.168)were important risk factors for college students' internet addiction. Conclusion The incidence of internet addiction among college students is higher, and mobile internet addiction is more obvious. Internet addiction and academic achievement may be mutually causal. Non-democratic family is a high risk factor for internet addiction.

Key words: internet addiction, college students, Chinese internet addiction scale, mobile phone addiction index, Logistic regression analysis