An internal asymmetrically designed 8-shaped steel plate (1) for temporary hemiepiphysiodesis includes two single orifice plates (11, 12). Each unilateral orifice plate (11, 12) is provided with a hinged opening (111,121). The two single orifice plates (11, 12) are connected by passing a pivot through the hinged openings (111, 121). The two single orifice plates (11, 12) can be assembled into the asymmetrically 8-shaped steel plate (1). The asymmetrically 8-shaped steel plate (1) is supplied with various specifications and can be provided with various combinations according to the irregular deformity condition on the two sides of patients physeal line (5).