Abstract: In order to investigate the working characteristics of the dual synthetic hot jet actuator in icing environment, the discrete phase model(DPM) combined with dynamic mesh method was used to study the influences of inlet velocity, droplet content and droplet diameter in icing environment on the characteristics of the actuator. The results show that when the inlet velocity is low, a fusion zone of synthetic hot jet is formed at the exit of the dual synthetic jet actuator. Because of the heating effect of the hot jet in the fusion zone, it is difficult for the supercooled droplets to enter the cavities of the actuator. When the inlet velocity is high, the vortices induced by the jets fall off to both sides of the actuator and the droplets continue to enter the cavities of the dual jet actuator, which makes the heating efficiency of the actuator decrease. Besides, the contents and the diameters of supercooled droplets almost do not affect the velocity filed of the dual synthetic jet actuator. With the increase of the concentration of supercooled droplets and the decrease of the droplet diameter, the heating efficiency of actuator decreases gradually.