The utility model is suitable for a construction technical field provides a self -interacting formula steel plate wall school regular triangle props, including horizon bar, down tube, rope and draw off mechanism. On the stiff end of horizon bar is fixed in steel plate wall perpendicularily, the one end of down tube and the regulation of horizon bar end fixed connection, its other end is fixed in on the steel plate wall aslope, the regulation of horizon bar is served and still is provided with the lug, and the lug passes through the rope to be connected with the lug on steel plate wall top, and the draw off mechanism is connected with rope drive. The utility model discloses a school regular triangle props simple structure, lays the convenience, and maneuverability is strong, has improved the efficiency of construction. Constructor also can accomplish correction work in narrow and small space, its structural style safe and reliable is portably durable, can set up everywhere according to the correction demand, can avoid the place restriction in the use completely, and not influence other job executions. And regulation nature is strong, can adjust structure type and size according to different work condition, the range of application is wide.