Wound expansion device convenient to fix

The utility model relates to the technical field of wound expansion, and discloses a wound expansion device convenient to fix, which comprises an end plate, an expansion mechanism and a fixing rod, the end plate is of a triangular plate structure, a through hole is formed in the middle of the end plate, the through hole is of a circular hole groove structure, the expansion mechanism is arranged at the side end of the end plate, and the fixing rod is arranged on the expansion mechanism. The fixing rod is slidably connected to the end of the end plate, the fixing rod is of an L-shaped tubular structure, a sleeve is connected to the bottom of the fixing rod, the expansion mechanism comprises an expansion plate, a pull rod and a pull plate, the pull rod is connected to the side end of the end plate in a penetrating mode, the expansion plate is fixedly arranged at the inner side end of the pull rod, and the pull plate is fixedly arranged at the outer side end of the pull rod. The device is convenient to directly a