Objective To understand the cognitive and behavioral status of weight management among college students in Suzhou City,and analyze the internal group differences of college students' weight management,so as to provide basis for taking accurate intervention measures. Methods 1428 college students from 4 universities in Suzhou City were selected as the research objects by convenience sampling method.Self-made questionnaire was used to investigate the cognition and behavior of college students' weight management,and to understand the weight management support obtained by college students. Results The results showed that the respondents had some misunderstandings about healthy weight and had taken unscientific weight management behavior.There were differences in the BMI (χ²= 23.590,p ＜ 0.001) and weight control willingness (χ²= 159.954,P＜ 0.001) among college students of different genders.There were statistically significant differences in eating habits (t=9.921,P=0.002) and exercise behavior (t= 34.494,P＜ 0.001) between male and female college students.The scores of dietary structure behavior of urban college students was higher than that of rural college students (t=4.038,P=0.045).The scores of eating habits and behavior of medical college students were higher than those of non-medical college students (t=4.038,P＜0.001).The sports behavior scores of junior college students were higher than those of middle and senior college students (t=6.620,P=0.007). Conclusion There are certain differences in weight management cognition and behavior among students of different genders,grades,growth environments,and majors in 4 universities in Suzhou City.Targeted intervention measures need to be taken,and universities should provide active support in the weight management of college students.