Injured athletes need to do appropriate exercises to restore dynamic balance capacity. This paper briefly introduced core stability and its training. Twenty athletes with knee injuries in the Third Hospital of Shanxi Province were divided into a regular training group and a core training group, for example, analysis. The knee joint function and coordination and balance ability of both groups before and after training were tested. The results suggest that core stability training is more conducive to promoting the recovery of knee function and coordination and balance ability under dynamic and static conditions.