The utility model provides a casing milling fishing gear which comprises an outer barrel, an inner barrel rotatably arranged in the outer barrel in a sleeved mode and an upper joint mounted at the upper end of the outer barrel. The lower end of the outer barrel protrudes inwards to form an annular boss, and the inner barrel is mounted between the upper joint and the annular boss. A plurality of openings are formed in the barrel wall of the inner barrel, each opening is provided with a one-way baffle which forms a preset angle with a center shaft of the inner barrel, and the lower end of the outer barrel is provided with an alloy layer which is used for conducting casing milling on a fishing object in a paved welding mode. Through the casing milling fishing gear, the fishing problem of small-size falling objects can be effectively solved, and the fishing efficiency is improved.