Rigid joint diaphragm wall steel box lowering perpendicularity detection system and detection method

The invention discloses a rigid joint diaphragm wall steel box lowering verticality detection system and detection method, and relates to the technical field of diaphragm wall steel box installation equipment, the system comprises a steel box segment and a guide wall for installing the steel box segment, the steel box segment is provided with an inclinometer, the steel box segment is provided with a reflector plate, and the reflector plate is provided with a rigid joint. And a total station matched with the reflector plate is arranged outside the steel box section. The perpendicularity of the steel box is detected through the inclinometer, the radiation sheet and the total station which are arranged on the steel box section, so that accurate lowering of the steel box section during lowering is achieved, the lowering construction quality of the steel box is improved, and the construction risk is reduced; and the inclinometer is zeroed and corrected by data detected by matching of the total station and the refl