The invention belongs to the technical field of silt and sand drought beating, and relates to a drought beating sand blowing machine. The drought beating sand blowing machine comprises a crawler and asupporting frame arranged on the upper surface of the crawler. A diesel engine for providing power for the crawler is assembled to the supporting frame and is further connected with a power generator. A high-pressure water supplementing gun supporting frame is arranged at the front end of the supporting frame and provided with two high-pressure water supplementing guns capable of adjusting the sand blowing angle within 360 degrees, and the water supplementing guns are connected with a water supplementing pump through pipelines. The water supplementing pump is connected with a water source. The side, located on the water supplementing guns, of the supporting frame is provided with a mud pump, an outlet of the mud pump is connected with a filling pipeline, and a filling bag is connected tothe other end of the filling pipeline. The drought beating sand blowing machine solves the problem that traditionally, water supplementing guns are manually operated, and water and sand are mixed to be poured into a filling sand bag together in cooperation with a mud pump. The defects that manual work is consumed, the construction efficiency is low, and the construction time is long exist in actual project application. The sand blowing equipment improving manner is adopted in the drought beating sand blowing machine, and the purposes that manual work is saved, the construction period is shortened, and the construction efficiency is improved are achieved.