The invention discloses a suspended scaffolding static load test method, which solves the problems of large investment, complex process steps, long construction period and low safety of the conventional method. The method comprises the following steps: constructing two right-triangle reaction frames on each of the two web plates of a cast concrete beam of which the vertical section is shaped like a Chinese character 'hui'; mounting two jacks on the steel base plates under each reaction frames respectively; synchronously and slowly load the suspended scaffolding by the two jacks till the load of the suspended scaffolding reaches 20 percent of the rated load of the suspended scaffolding at the same time, standing for 20 minutes, and measuring the deflection of the suspended scaffolding and the strain of the stressed rod of the suspended scaffolding; and synchronously and slowly loading till the 50 percent, 75 percent, 90 percent, 100 percent, 110 percent and 120 percent of the rated load of the suspended scaffolding in turn, standing for a certain time period, and measuring the deflection, unloading step by step, and measuring the deflection of the suspended scaffolding. The method reduces the suspended scaffolding static load test time greatly, saves cost and avoids damages to the lower structures of beams and bridges as well as piers.