Abstract: Objective To understand the nutritional knowledge，attitudes and dietary behaviors of Xinjiang minority college students and their relationship with body mass index，provide references for improving the nutritional knowledge and weight control of Xinjiang minority college students. Methods From April to June in 2021，a total of 1 842 college students from two universities in Xinjiang were selected as the survey subjects.The nutritional knowledge，attitude and behavior were investigated，to analyze the differences in nutritional knowledge，attitude and behavior of college students with different body mass index. Results The scores of nutritional knowledge，nutritional attitude and eating behavior among Xinjiang minority college students were （74.26±15.01），（26.31±3.14） and （35.12±4.92）points，respectively.The scores of girls in nutritional knowledge，attitude and eating behavior were significantly higher than those of boys，with statistical significance（all P<0.01）.The proportion of underweight students was 15.91%，and the proportion of overweight and obese students was 9.77%.The proportion of underweight girls was significantly higher than that of boys，with statistical significance（χ²=58.16，P<0.01）. The proportion of overweight and obese boys was significantly higher than that of girls，with statistical significance（χ²=142.14，P<0.01）.The proportion of underweight students in the upper gradeswas higher than that of students in the lower grades，while the proportions of overweight and obesity in the upper grades were significantly lower than those of students in the lower grades，and the differences were statistically significant（both P<0.05）.The normal-weight college students scored the highest on eating behavior，followed by underweight students，while the overweight and obese students had the lowest scores，and the differenceswere statistically significant（P<0.05）. The correlation analysis showed that underweight was negatively correlated with eating behavior（r=-0.23，P<0.05），while the normal weight，overweight and obesity were positively correlated with eating behavior（r=0.68，0.66，both P<0.05）. Conclusion There is a connection between the dietary behavior and the body mass index of minority college students in Xinjiang，so the nutrition and health education should be actively carried out in the future，and necessary intervention measures should be taken to improve their physical fitness.

Key words: College students, Adolescents, Nutritional knowledge, Body mass index, Relationship