Abstract: This paper takes the 150201 fully mechanized caving face of Yangchangwan coal mine as the engineering background, and established the mathematical model of spray dust control through the analysis of the variation of the air flow field of the spray control dust of the shearer, calculates the dust control spray angle and the quantity of the nozzle, and designs the fan screen dust control device suitable for the conditions according to the structure of the shearer, and realizes the dust control of the coal cutter fan cutting fan section. It can effectively solve the problem of coal cutting dust diffusion pollution; Through laboratory tests and field applications, it is shown that the effective range of the fan mist curtain dust control device is 3.5m above the spray pressure 6~8MPa, and the effective coverage area can reach more than 4.9m2. The total dust and respirable dust concentration in driver's position decreased from 534.6 mg/m3 and 156.8 mg/m3 to 146.8 mg/m3 and 48.6 mg/m3 respectively, and the dust reduction efficiency was 72.54% and 69.01% respectively; The concentration of total dust and respirable dust at 10m position at the tail of the shearer were reduced by 73.85% and 72.16% respectively. The fan-shaped fog curtain dust control device developed can effectively reduce the problem of transverse diffusion of coal cutting dust of the shearer, and the operating environment of the operators has been significantly improved.