Knee joint traction rehabilitation system

The invention discloses a knee joint traction rehabilitation system which comprises a hip and crotch supporting piece, two sets of popliteal space supporting and guiding assemblies which are symmetrically distributed are arranged on the outer side of the hip and crotch supporting piece, and a traction downward probing and diameter adjusting assembly and an ankle follow-up travel path adjusting and controlling assembly are installed on the outer sides of the popliteal space supporting and guiding assemblies; after a rehabilitation person is guided to sit at the upper end of the hip and hip supporting piece, feet and limbs are erected at the position of the leg included angle inner supporting base to be in a hooking and lying shape, the tiptoe is placed on the inner side of the embedded cushion area base, at the moment, the leg included angle inner supporting base supports the popliteal space, and then the popliteal space is supported by controlling the leg included angle inner supporting base to rotate clockwi