Brake drum detecting tool

The invention discloses a brake drum detecting tool, which has the technical scheme that the brake drum detecting tool comprises a dial indicator and a support frame, wherein the upper part of the support frame is provided with the dial indicator, the lower part of the dial indicator props against a convex block, the lower part of the convex block is provided with a spring, the bottom of the spring is provided with a slide block, the slide block penetrates from a hole arranged in the support frame, the end part of the slide block is provided with a measuring head, and the middle of the support frame is provided with a fixing pin. The brake drum detecting tool has the advantages that the structure is reasonable, the use is convenient, the precision of the inner friction surface of a brake drum can be accurately detected, and the use effect is better.