【Objective】 To investigate the therapeutic effect of rehabilitation training after knee arthroscopic operation on the impact of the function of the knee.【Methods】 Sixty patients with osteoarthritis of the knee after arthroscopy were divided into Integrated Group,physiotherapy group and the control group according to treatment,20 cases.Integrated group was injected into the knee joint injection of sodium hyaluronate、rehabilitation training and physical therapy.Physiotherapy group was injected into the knee joint injection of sodium hyaluronate and physical therapy.Control group was injected into the knee joint injection of sodium hyaluronate.After 8 weeks' treatment,Treatment and Lysholm score of knee joint were analyzed.【Results】 The improvement of knee joint function in the rehabilitation group were best than that in the physical therapy group and the control group.【Conclusion】 The rehabilitation treatment after knee arthroscopic operation can speed up the recovery of knee function.