Knee joint function training device

The invention discloses a knee joint function training device. The device comprises a rack, a supporting device, a driving device, a fixing pressing device and a control device; the supporting devicecomprises a supporting frame slidingly connected with a shell and vertically arranged, a foot fixing sleeve rotatably connected with the supporting frame, a calf placement frame rotatably connected with the upper end of the supporting frame and located at the side close to the upper limb of a patient and a thigh placement frame rotatably connected with the end, away from the foot fixing sleeve, ofthe calf placement frame; the other end of the thigh placement frame is rotatably connected with the end, close to the upper limb of the patient, of the shell; the fixing pressing device comprises afirst airbag belt, a second airbag belt and an intermittent inflation pressure pump; since the lower limb of the patient is subjected to isometric contraction and isotonic contraction which are closerto the physiological moveme