The utility model discloses a polishing miller for connecting rod bodies and connecting rod covers, and relates to the field of machining. The polishing miller comprises a rack, a polisher and a connecting rod fixation device, wherein the polisher is fixedly connected to the left and right sides of the rack; the connecting rod fixation device is positioned in the middle of the rack and comprises a moving frame movably connected to the upper end of the rack and a positioning plate fixedly connected to the upper end of the moving frame; positioning blocks, positioning rods and positioning screws are arranged on the front and rear sides of the positioning plate; the rear ends of the positioning blocks penetrate through the positioning rods; the middles of the positioning blocks are fixed through the positioning screws. The polishing miller is simple in structure and convenient to operate; the plurality of connecting rod bodies and connecting rod covers can be simultaneously polished and accurately positioned; moreover, the connecting rod bodies and the connecting rod covers are stable in structure in a polishing process, the polishing efficiency of the connecting rod bodies and the connecting rod covers is improved, and the polishing quality is guaranteed.