Steel pipe inner wall polishing equipment

The utility model relates to the technical field of steel pipe machining, in particular to steel pipe inner wall polishing equipment which comprises an operation table, a polishing component is arranged at the top of the operation table and comprises a first motor, a grinding wheel and a lifting plate, the output end of the first motor is horizontally and fixedly connected with a fixing rod, and a key groove is formed in the right end of the fixing rod. A key shaft is horizontally and fixedly connected to the left side wall of the grinding wheel and installed in the key groove, a through hole is formed in the outer wall of the fixing rod and communicates with the key groove, a limiting groove is formed in the outer wall of the key shaft, an L-shaped plate is fixedly connected to the outer wall of the fixing rod, and a limiting rod is movably connected into the L-shaped plate. According to the steel pipe grinding wheel replacing device, the grinding wheel can be rapidly replaced, so that the steel pipe grindin