Abstract: According to the study of air flow distribution condition, dust diffusion law, air curtain controlling dust mechanism and the other influencing factors in tunneling working face, the paper determines the control region of air curtain controlling dust, the main technical parameters and arrangement positions of air curtain controlling devices. On this basis, the paper establishes tunneling working face model to simulate dust suppression system and makes experiment. The result show that the dust efficiency at drivers position is more than 80%, and the dust control efficiency of the air curtain is more than 70% after using air curtain controlling dust technology.