According to he Manual of the Investigation and Study for the National Physical Condition, we made physical examination to our 607 college students in 2000 of Shaanxi province. Comparing the result of physical diathesis with that of the whole Shanxi province in 1985 and that of our university in 1995, we discovered that endurance diathesis, strength diathesis, speed and flexility diathesis of boys in city has declined greatly, but sensitivity diathesis has enhanced greatly. The descend of diathesis is closly related to the descend of vital capacity. Physical education in colleges prefer technique to diathesis, the descend of hemogram diathesis in the student of 19 years old is related to physical education in senior high school.