The utility model discloses a lathe cutter bar automatic scrap iron removing device. A lathe tool (2) is arranged on a lathe tool turret (1) which is provided with a cooling fluid nozzle (3) in a clamped mode, the cooling fluid nozzle (3) is connected with an outlet of a cooling pump (5) through a cooling fluid pipe (4), the cooling pump (5) is arranged on a water tank (6), a high-pressure water spray nozzle (7) is arranged on the lathe tool turret (1), the high-pressure water spray nozzle (7) can spray water along a lathe tool rod of the lathe tool (2) to the direction of a lathe tool point, the high-pressure water spray nozzle (7) is connected with an outlet of a high-pressure water pump (9) through a high-pressure water pipe (8), and the high-pressure water pump (9) is arranged on the water tank (6). According to the lathe cutter bar automatic scrap iron removing device, the scrap irons on the lathe can be automatically removed through spraying high-pressure water flow to avoid winding of the scrap irons, on one hand, the safety hazards of manually removing the scrap irons are eliminated; on the other hand, scratching and even scraping of a processed workpiece can be effectively prevented; the lathe cutter bar automatic scrap iron removing device has the advantages that the design is reasonable, the structure is simple, the reconstruction is easy, and the reconstruction cost is low.