In this study, the body fat of 186 freshmen and sophomore students in college are tested and analyzed in experimental condition. The results indescated that abdominal obesity and body fat rate of freshmen and sophomore students in college close to normal lower levels, abdominal obesity levels of sophomore girls belong to subcutaneous type, body fat rate of boys is slim grade; Abdominal obesity, body fat percentage, and body mass index of sophomore students are lower than freshmen; For the second grade students, the problem of underweight is more serious than obesity; The correlation coefficient of body fat rate and body mass index is 0.855 for boys and girls 0.757, indicating that the use of body mass index to describe physical plumpness of college students has a high degree of validity; Boys ages of all grades has a normal state, the girls partial ＂aging＂ , especially girls of the second grade; Weight of each grade boys and girls is less than standard level.