Positioning tool for detecting braking performance of drum brake

The utility model relates to the field of brake detection, in particular to a positioning tool for detecting the brake performance of a drum brake, which comprises a workbench, a first mounting frame arranged above the workbench, symmetrically distributed support columns arranged below the workbench, and symmetrically distributed connecting blocks arranged between the workbench and the first mounting frame. First mounting plates which are symmetrically distributed are arranged on one side of the first mounting frame, three detection rotating wheels are arranged on one side of the workbench, and a first motor fixed through bolts is arranged below the first mounting plates; according to the utility model, a method that three testing devices are matched with six positioning devices is adopted, brake testing is carried out on three drum brakes at the same time, and when three of the six positioning devices are used for testing, the other three positioning devices can carry out feeding and discharging through an e