To observe the effect of acupuncture combined with rehabilitation training in the treatment of exercise induced knee osteoarthritis, and to investigate the effect of the acupuncture on the function and biomechanics of knee joint.Methods:Randomly selected 80 patients with exercise induced knee osteoarthritis in our rehabilitation clinic and inpatient department from January 2016 to January 2017.Then were then divided into observation group and control group by random number table method.The observation group was treated with acupuncture combined with rehabilitation training, and the control group only received rehabilitation training.After treatment of 4 weeks, conduct isokinetic muscle strength test in determination of the angular velocity were 60°/s and 180°/s of the two groups respectively.Also, test the ratio of muscle peak torque and four muscles centripetal centripetal peak torque and peak torque, work load of femoral knee joints after (H/Q), simultaneous determination of angular velocity at 60°/s, besides surface EMG related muscles, and knee joint function evaluation Lysholm.Results:1) After 4 weeks of treatment, the observation group Lysholm score of knee joint function was obviously improved (P<0.05), and the observation group was significantly better than the control group (P<0.05); 2) Angular velocity of 60°/s and 180°/s when tested two groups of peak torque, work load and the H/Q values were significantly increased (P<0.05), and the observation group was significantly better than the control group (P<0.05), when the angular velocity is 60°/s, the observation group of flexor and extensor sEMG improvement was significantly better than the control group (P<0.05); 3) the two groups after treatment of extensor and flexor muscle strength were improved (P<0.05), and the observation group was significantly better than the control group (P<0.05).Conclusion:Acupuncture combined with rehabilitation training can effectively improve the symptoms of patients with knee injury and the function of knee joint.The mechanism is mainly by increasing the knee muscle strength and improving the level of their participation in the activities of the biomechanics of knee joint.