Objective: To explore the influence of WeChat-led diversified health education on college students physical exercise behavior and self-body image. Methods: The cluster stratified sampling method was adopted to select 276 students from Changzhou College of Information Technology in March 2019. According to the random number table method, they were divided into 145 cases in the treatment group and 131 cases in the control group. The control group was given regular physical exercise education, and the treatment group jointly applied diversified physical exercise health education based on WeChat. Three months later, the physical exercise behavior and self-body image of the two groups of college students were compared. Results: The college students in the treatment group regularly participated in physical exercise (79.31%), exercise frequency ≥3 times/week(70.34%), exercise time ≥30 min/time(64.60%), and each exercise intensity medium and above(73.10%), monthly exercise cost 100-300 yuan/month(49.66%), which were significantly higher than the control group (62.60%, 54.20%, 51.15%, 61.07%, 36.64%), monthly exercise cost <100 yuan(33.79%),sports injury (47.59%) were significantly lower than the control group (49.62%,59.54%), the difference were statistically significant (P<0.05). Appearance evaluation score (3.87±0.32), appearance attitude score (3.92±0.28), physical fitness attitude score (3.80±0.33), health evaluation score (3.78±0.24), disease attitude score (3.54±0.42), body part satisfaction score (3.61±0.38) and overweight worry score (3.14±0.45) were significantly higher than those of the control group (3.54±0.36, 3.60±0.34, 3.56±0.42, 3.51±0.31, 3.01±0.36, 3.32±0.41, 2.78±0.35), the difference was statistically significant (t=8.06, 8.57，5.30, 8.13, 11.15, 6.10, 7.36, P<0.05). Conclusion Diversified health education based on WeChat is helpful to promote the development of college students- physical exercise behavior, and has positive application value for improving self-body image.