Particulate matter produced by biomass combustion is one of the important sources of global atmospheric particles. Its contribution to global ice nucleating particles cannot be ignored. The abundance of ice nucleating particles in the atmosphere is of great significance to the lifetime and precipitation rate of ice clouds and mixed clouds. Potassium is a main tracer for the biomass burning aerosols. It mainly exists in the form of water-soluble inorganic salts, such as potassium chloride and potassium sulfate. Here we investigated the ice nucleation properties of three kinds of potassium salts prepared in the laboratory.The results showed similar ice nucleation properties for the three types of tested potassium salts. From 215K to 230K, these particles nucleated ice at relative humidity with respect to ice (RH_ice) between 120% and 140%. Below 210K, the ice nucleation onset RH_ice for these tested particles increased. Between 235K and 245K, the particles took up water first, and formed ice through immersion freezing at about 140% RH_ice. We show that potassium chloride, potassium sulfate, and potassium nitrate particles can sever as efficient INPs in both deposition mode and immersion freezing.