Expander for orthopedic surgery

The invention relates to the technical field of medical instruments, in particular to a dilator for orthopedic surgery, which comprises a first handheld frame, a second handheld frame, a rotating shaft, a rotating rod, a fixed dilation plate, a mounting shaft, a movable dilation plate and the like, the first handheld frame is rotatably connected with the second handheld frame, and the first handheld frame and the second handheld frame are rotatably connected with the rotating shaft. The rotating shafts are connected with rotating rods, the bottoms of the rotating rods are connected with three fixed expansion plates, the tops of the rotating rods are provided with mounting grooves, the mounting grooves are internally connected with mounting shafts, and the mounting shafts are rotationally connected with three movable expansion plates. A surgical incision can be expanded through the fixed expansion plate and the movable expansion plates, a doctor can conveniently perform an operation, the use number of the mova