Detection tool for detecting concentricity of arc surface of workpiece

The utility model discloses a detection tool used for detecting concentricity of a workpiece arc surface, the detection tool comprises a fixing assembly and a concentricity measuring piece, the fixing assembly comprises a pedestal and a clamping assembly, and the clamping assembly comprises a clamping plate and a spring; wherein the clamping plate is rotatably connected with the base, and the clamping plate is used for clamping a to-be-tested workpiece on the base under the elastic force action of the spring; the concentricity measuring piece is rotatably connected with the clamping plate, one end part of the concentricity measuring piece is provided with a standard radian surface, one end, close to a workpiece to be measured, of the clamping plate is provided with a penetrating type through groove along the vertical direction, and the concentricity measuring piece is rotatably arranged in the penetrating type through groove; the end, provided with the standard radian face, of the concentricity measuring piec