Leg adduction and abduction trainer

The invention provides a leg adduction and abduction trainer. The leg adduction and abduction trainer comprises a rack, a driving piece, a leg supporting piece and a transmission mechanism. The rack is provided with a bottom bracket arranged on a mounting surface; the driving piece is arranged on the bottom bracket; the leg supporting piece is provided with a first end and a second end, the second end is constructed to be a force acting end during leg adduction and abduction training, and the second end is provided with an adaptive piece adaptive to leg fixation; the driving piece is connected with the first end through a transmission mechanism; wherein the driving part has a first working mode and a second working mode, and in the first working mode, acting force is applied through the second end to drive the leg supporting part so that the driving part can work at first power; and in the second working mode, the driving piece works at second power to enable the leg supporting piece to apply acting force to