The invention discloses a feeding mechanism of a rough machining rotary machine tool for a compressor cylinder. A mounting base is composed of two side plates, a protruding block is arranged at the top of the upper side plate, and a fixed plate is mounted at the top of the protruding block. A servo motor is mounted above the fixed plate, and a gear is engaged with the lower portion of the servo motor. A guide rail is mounted on the front side of the upper side plate, and a sliding seat is clamped on the front side of the guide rail. A gear rack is mounted on the rear side of the top of the sliding seat, and a fixed block is arranged below the front side of the sliding seat. A turnover hydraulic cylinder is mounted above the fixed block, and the right side of the turnover hydraulic cylinderis connected with a turnover bottom plate. The front side and the rear side of the turnover bottom plate are connected with the upper right portion of the sliding seat through adjusting blocking sheets. A clamping device is mounted on the right side of the upper portion of the turnover bottom plate, and a correction finger is mounted on the left side of the upper portion of the turnover bottom plate. According to the feeding mechanism, impacts and noise are avoided in the part feeding process, and operation of an automatic logistics line is benefited. The beneficial effects that cleaning andsweeping are easy, and iron chips are not likely to be accumulated are achieved, and harm of cutting liquid and the noise to the human body is reduced to a large degree.