The invention relates to the field of agriculture, and particularly discloses a blowing type cleaning device for agricultural potato harvesting. The device comprises a shell, a potato filling port, adischarge hole and a base; the shell is internally provided with an inclined first screen board, the left end of the first screen board is higher than the right end of the first screen board, an opening is formed in the shell side wall corresponding to the lower end of the first screen board, a spraying and blowing shell located on the outer side of the shell is communicated with the opening, a horizontal rotating guide roller is coaxially and rotationally installed in the spraying and blowing shell, multiple rotating grooves concaved inwards are formed in the arc-shaped side wall of the rotating guide roller, a horizontal spraying and blowing tube is communicated with the side wall of the spraying and blowing shell, and the spraying and blowing tube is communicated with an air compressorthrough an air duct. Accordingly, potatoes move in the rotating grooves, in the moving process, the potatoes make contact with air blown out by the spraying and blowing tube, wet soil on the surfacesof the potatoes is blown away, soil at the hollow positions of the surfaces of the potatoes can be cleaned away, the cleaning effect on the potatoes is greatly improved, and soil residues are reduced.