Device for generating lumbar intervertebral space by bending knees

The utility model discloses a device for generating lumbar intervertebral space through knee bending. The device specifically comprises a first attaching piece and a second attaching piece, the second attaching piece and the first attaching piece are arranged in parallel; and the number of the connecting pieces is multiple, one end of each connecting piece is rotationally connected to the first attaching piece, and the other end of each connecting piece is rotationally connected to the second attaching piece. According to the knee joint fixing device, the first attaching part and the second attaching part which are parallel are arranged and are attached and fixed to the knees of the human body model, the multiple connecting pieces are arranged between the first attaching part and the second attaching part, and the connecting pieces are rotationally arranged on the first attaching piece and the second attaching piece; the relative positions of the first attaching piece and the second attaching piece are change