Roller shaft machining device

The utility model relates to the technical field of industry, in particular to a roller shaft machining device which comprises a cutter fixing seat, a water passing cavity is formed in the cutter fixing seat, a water inlet is formed in the top of the cutter fixing seat, the side face of the cutter fixing seat is concaved inwards to form a water spraying table, and spraying holes are formed in the water spraying table. A spraying hole is formed in the inner concave portion of the cutter fixing base and communicated with the water passing cavity, a base is arranged at the position, located in the inner concave portion, of the cutter fixing base, a containing groove is formed in the base, cutters are arranged in the containing groove, threaded holes are formed in the cutters in a penetrating mode, and cutter fixing holes are formed in the side, located on the base, of the cutter fixing base. According to the utility model, a row of obliquely fixed cutters are designed, the blade surfaces of the cutters form a hi