For the preparation of potassium salt in industry, such as potassium hydroxide, potassium carbonate, potassium sulfate, potassium ferricyanide, potassium nitrate, potassium chlorate, potassium chloride and phosphoric acid two Potassium Permanganate, is also widely used in petroleum industry, rubber industry and electroplating industry in agriculture. Potassium chloride is one of the three elements of fertilizer, it promotes the formation of plant protein and the carbohydrate, the ability of resistance, widely used in field crops and economic crops in China. The basal and top dressing of nitrogen and phosphorus fertilizer production and application of the serious imbalance, the phenomenon of potassium deficiency in the soil is serious. Especially in the applying amount of nitrogen and phosphorus fertilizer increasing, crop potassium deficiency is becoming more and more serious. In medicine supplement available electrolyte Potassium Chloride Tablets and Potassium Chloride Injection, can be made; and Sodium Chloride Injection made mixed infusion products; is important raw materials.