The utility model relates to a device for removing heavy rail flaw detection residual water, which is formed by an air intake pipe, an air collecting pipe, nozzles and a bearing plate, wherein the air collecting pipe is a transverse U-shaped pipe, the air intake and the bearing plate are connected on the outer side of the U-shaped air collecting pipe, and at least six nozzles with different angels are arranged on the inner side of the air collecting pipe. As compressed air is used as the blowing power, the device has sufficiency resource, and does not add more devices, and has simple structure, less investment and self manufacturing. The nozzles have appropriate number and reasonable angle designs, which can be used to complete remove residual water on the head of a rail, the waist of the rail and the bottom of the rail, and guarantees a heavy rail not to scratch with a blowing device. Compared with the steam roasting, the device saves a great amount of steam, increases the inspection quality, eliminates safety hidden dangers, meets the manufacturing requirements of heavy rails in 100m length, and solves the bottleneck problems which restrict the manufacturing of the heavy rails in northern winters.