Potassium sulfate compound fertilizer with potassium chloride conversion at low , chemical synthesis, spraying process material is made into production, good stability, in addition to containing the essential plant N, P, K three major nutrient elements, also contains trace elements S, Ca, Mg, Zn, Fe, Cu etc.. This fertilizer is suitable for all kinds of cash crops, especially chlorine free crops. The main ingredients of potassium sulfate type compound fertilizer are MAP (monoammonium phosphate), DAP (diammonium phosphate), ammonium sulfate (mainly converted to low-temperature sulfuric acid and gas ammonia neutralization). Potassium sulfate, urea, and other small amounts of impurities, such as calcium sulfate, phosphoric acid, iron, aluminum, magnesium and other salts, and a trace of unreacted potassium chloride