Turbocharger middle shell mistake proofing tool with protection device

The invention relates to the technical field of turbochargers, in particular to a turbocharger middle shell mistake-proofing tool with a protection device, which comprises a bottom layer detection block, a middle detection block is arranged in the bottom layer detection block, an upper layer detection block is arranged in the middle detection block, a positioning shaft is arranged on the surface of the upper layer detection block, and the positioning shaft is arranged on the surface of the upper layer detection block. A base is arranged at the bottom end of the bottom layer detection block; and the rotating rod is installed in the push cylinder, the top end of the rotating rod penetrates through the middle detection block and the base to be installed on the surface of the bottom end of the upper layer detection block, and the outer surface of the push cylinder is fixedly connected with a mounting ring. According to the invention, a second clamping ring is mounted at the bottom end part of the clamping column