Knee joint rehabilitation exercise auxiliary device

The utility model discloses a knee joint rehabilitation exercise auxiliary device, and relates to the technical field of medical auxiliary equipment. The seat adjusting device comprises a bottom plate, a first motor is matched with a lead screw, the first motor drives the lead screw to rotate, so that the lead screw drives a sliding sleeve to slide, the sliding sleeve drives a fixing plate to slide, the fixing plate drives a seat to slide, the left-right position of the seat can be adjusted conveniently, and then a first bevel gear is matched with a rotating shaft, so that the left-right position of the seat can be adjusted conveniently. The rotating shaft drives two first bevel gears to rotate, then through meshing of the first bevel gears and second bevel gears, the two first bevel gears drive two second bevel gears to rotate, the two second bevel gears drive two threaded rods to rotate, and therefore the two threaded rods drive two telescopic rods to ascend and descend. The two telescopic rods drive the se