Error-proof testing fixture for automobile bottom guard plate

The utility model provides a mistake-proofing testing fixture for an automobile bottom guard plate, which relates to the technical field of automobile mistake-proofing testing fixtures, and comprises a workbench, a set rule assembly is arranged on the peripheral wall of the workbench, the set rule assembly comprises a side plate movably connected with the outer wall of the workbench, a separation blade is arranged at the top of the side plate, a scale mark is arranged on the separation blade, and the set rule assembly is arranged on the side plate. A sliding hole is formed close to the top of the side plate; the device further comprises an error-proofing inspection assembly arranged in the workbench, the error-proofing inspection assembly comprises a suction cup, the top of the suction cup is provided with an error-proofing column used for error-proofing inspection, the top of the error-proofing column is provided with a first connecting hole and a second connecting hole, and the first connecting hole and the