Muscle force and power are the importance factors in the modern sport. Jump is close related to muscle power. Therefore, muscle power is the key to the sport performance. The goal of the study was to examine the relationships among jump height, force and velocity in general undergraduates. Pearson correlation coefficient was used to analyze the relationships among the variables. The results showed that the heights of vertical jump are positive related to ground reaction force and ratio of force generation respectively. To improve muscle power not only the training of force, but also combine the ability of fast power.