Objective:To study the effect of Simplified Taijiquan on college Studentsbody shape and breathing function.Methods: 60 Zunyi Normal College students(19.1 ± 2.2 years old)were selected,with 30 males and 30 females,and were randomly divided into exercise group and control group.Each group would take the exercise for 5 days a week,1 hour a day.Subjects from the 2 groups were tested every 4 weeks in terms of body shape index as well as vital capacity,oxygen uptake and carbon dioxide excretion and respiratory index.Results and conclusion: Between the Tai Chi group and the control group,there were no statistically significant differences in terms of the fundamental data such as height,leg length,tendon length,ankle girth,hip width,shoulder width and weight(P>0.05).Through the changes of the three indexes of pulmonary ventilation(V ′ E),oxygen consumption(V ′ O2)and carbon dioxide output(V ′ CO2)found in the 40 college students,it is easy to discover that during the exercise,the index of pulmonary ventilation of the students in Tai Chi group was in a cumulative rise,and both the male and female studentsvital capacity were higher than those in the control group.