Precise positioning and mounting tool for prefabricated steps of stadium and using method of precise positioning and mounting tool

The invention discloses a stadium prefabricated step accurate positioning and mounting tool and a using method, the mounting tool comprises a supporting frame, a bearing pole and an adjusting lever, the supporting frame is arranged on a step, the adjusting lever is movably arranged on the supporting frame and performs front-back pitching swing and left-right rotation on the supporting frame, and the bearing pole is arranged on the supporting frame. The bearing pole is detachably arranged at the front end of the adjusting lever, and the prefabricated step is arranged in the bearing pole. Up-down pitching and left-right swinging actions are achieved through cooperation of the adjusting lever and the supporting frame, when the step plates are installed, the positions of the step plates are adjusted through pitching and left-right swinging, the installation positions and precision of the step plates meet the installation requirements, and then accurate installation of the step plates is guaranteed; and the steps