Abstract: Objective: To study and summarize the rehabilitation training after ACL reconstruction of Xu Mengtao in order to provide reference for the arrangement of rehabilitation training in other high-level athletes. Methods: 1) Rehabilitation training intervention.The 14~42 weeks training program was divided into four stages according to the actual physical condition, test data and competition demand of Xu Mengtao. The purpose of the intervention was to improve the strength and proprioception of left knee, to reduce the strength difference between the left and right knee, and to develop the core muscle ability, balance and aerobic ability;2) The comprehensive evaluation of athletes' rehabilitation effect was conducted after special physical fitness tests, isokinetic test and balance test. Results: 10 of the 15 special physical fitness test indexes reached to the best performance before injury, and the other 5 items recovered more than 90% of the best performance before injury. The isokinetic symmetry of knees recovered more than 85% and the balance reached to the aerials requirement. Conclusion: After 14~42 weeks of rehabilitation physical training, Xu Mengtao's left knee muscle strength, balance and explosive force were recovered significantly, the lower limb muscle strength symmetry reached to a reasonable range, and body functions have reached to the requirements of aerials training and competition.