The surface heat transfer characteristics of the split ring is very important to improve the efficiency of anti-icing design. In view of the complexity and high cost of the test rig in the traditional hot gas anti-icing scheme， this paper puts forward a new type of electric heating film anti-icing design scheme. According to the law of energy conservation， the theoretical formula of surface heat transfer coefficient of split ring is deduced. The influences of different pitch angle， velocity， liquid water content（LWC） and median volumetric diameter（MVD） on the surface heat transfer characteristics of the split ring are experimentally researched. The experimental results show that the heat transfer coefficient in the leading edge region first increases and then decreases with the pitch angle， and the 25° pitch angle is an obvious turning point. Under the same conditions， the average heat transfer coefficient of the leading edge and the lower surface under the spray condition is about 3 times that under the dry air condition. The heat transfer coefficient of the leading edge of the split ring is significantly greater than those of the upper and lower surfaces.