The invention relates to a knee rehabilitation machine with multi-position synchronous force application, which comprises a bottom box, a vertical box and a suspension box; the vertical box is vertically arranged at one end of the bottom box, the suspension box is transversely and fixedly arranged at the upper end of the vertical box, a pressing unit rocker mechanism is fitted in the bottom box, and a transmission mechanism for a vibration unit, a traction unit and a pressing unit are fitted in the vertical box. The traditional Chinese medicine method for correcting the instability state of knee joint is simulated, synchronous scientific force application adjustment is carried out on the relationship between the femur and the tibia through suspension, traction, torsion, pressing and vibration with controllable strength, angle and distance, the femur and the tibia are restored to the normal natural states by means of the memory of the human body, the instability state of the knee jointis corrected, various discomforts caused by the instability state is eliminated, and the occurrence of knee joint diseases is prevented.