To analyse the current situation and trends of wasting and overweight obesity among Han Chinese college students from 2000 to 2019, and to provide a basis for the prevention of wasting and overweight obesity among college students.

The body mass index data of 72 983 Han Chinese college students were selected from five national surveys on students’ physical fitness and health from 2000 to 2019, and the “height-standard weight method” used in the 1985 national survey on physical fitness and health was used to screen for emaciation and overweight-obesity, and the detection rate, increase and annual growth rate of emaciation and overweight-obesity were calculated for college students by gender and age. The detection rate, increase rate and annual growth rate of college students were calculated by gender and age. Statistical analyses were performed using one-way ANOVA, sample-weighted linear regression, χ² test and χ² trend test.

From 2000 to 2019, the BMI of Chinese Han college students all showed a continuous increasing trend, with different growth rates for male and female students in each age group (except for the female group, the P-trend value for male students in each age group was <0.05). Both male and female students' wasting detection rates showed a decreasing trend from 2014-2019.From 2000 to 2019, the overweight and obesity rate of Chinese Han college students continued to increase, and the overweight and obesity rate of male students was higher than that of female students.From 2000 to 2019, the wasting of Chinese Han college students aged 19 to 22 years old The annual growth rate of overweight and obesity of male students has been decreasing, and the annual growth rate of overweight and obesity of male students has been increasing, and the difference in the increase of the annual growth rate of overweight and obesity of male students in each age group is relatively small. 2010-2019, the annual growth rate of overweight and obesity of female students began to increase gradually, and the increase was the largest in 2014-2019, and the increase was the most obvious The largest increase in the annual growth rate of overweight obesity among female students was observed in the age group of 22 years.

At 2019, the trend of the growth of college students' wasting rate has been alleviated, but the overweight and obesity rate is in a continuous growth trend, the relevant government departments should formulate targeted physical health policies to prevent and alleviate the problem of college students’ overweight and obesity.