Knee joint soreness and weakness can be treated by the following methods: first, manipulative therapy, the patient takes a flat sitting position or supine position, the operator uses pressure, kneading, kneading method, flicking method, shaking method, percussion method, etc. to apply treatment for 10-15 minutes, 1-2 times a day, 15 days as a course of treatment, can eliminate muscle tension stiffness, spasm and soreness; second, hot water bath therapy, the water temperature in the bath tub to 38- 42 ℃, the patient is sitting or lying on his back in the pool, the water surface over the uppermost skin of the quadriceps, gradually heating the water to 42 ℃, water bath for more than 20 minutes. If in the water to do manual therapy, can improve the efficacy, 1-2 days once, 15 times for a course of treatment; third, stretching therapy, the patient to take a prone position, knees flexed as far as possible, hands are holding the back of the ipsilateral foot, spine and hip extension, stationary 1-2 minutes, repeat 3-5 times.