Purpose: To understand college students' physical and mental health status and the use of WI-FI, and to explore the relationship between them. Method: A total of 1174 undergraduate students from 5 universities in Guangdong province were selected by stratified random method, and they were investigated by using personal general situation questionnaire (scl-90) and WI-FI questionnaire (WI-FI) compiled by themselves. Result: (1) The overall mental health of college students is good, but there are sub-health problems, mainly manifested as somatization, interpersonal sensitivity, compulsion, depression, anxiety, etc. (2) There are obvious somatic sub-health problems in college students, which are mainly manifested in pain and numbness of neck and lumbar spine, dry eyes, even pain and vision loss. (3) College students lack sufficient knowledge of WI-FI. 80.32% of college students belong to high frequency WI-FI users, and 17.12% are addicted to WI-FI. (4) Multivariate linear regression analysis results show that college students' mental health level (SCL - 90 total split) were the major influencing factors of the following aspects: the purpose of understanding of WI-FI, surfing the Internet, on the degree of psychological dependence on WI-FI, whether to install WI-FI software, mobile phone support WI-FI, degree of eyes, neck involvement, the degree of lumbar spine involvement, the places and time of WI-FI use, the WI-FI hours a day on average, and whether to use WI-FI access to the Internet in class time. Conclusion: College students have physical and mental sub-health problems, and the use of WI-FI has a significant impact on their physical and mental health.
