The utility model relates to a production facility of potassium chlorate, including alkaline sodium chloride dissolving device and potassium chloride dissolving device, potassium chloride dissolving device is through first filter intercommunication metathesis reaction equipment, basicity sodium chloride dissolving device intercommunication has the electrolysis trough, and electrolysis trough intercommunication chlorine remove device and metathesis reaction equipment, metathesis reaction equipment intercommunication have the crystallizer, crystallizer intercommunication centrifugal device, and centrifugal device communicates alkaline sodium chloride dissolving device, the crystallizer intercommunication has the solution enrichment facility, basicity sodium chloride dissolving device and potassium chloride dissolving device all are connected with the flowmeter. The utility model discloses a liquid the configuration of liquid system makes among the potassium chloride production measurement accurate, and the quality is easily controlled, does not have the with filling material, and detaches solid waste easily, prevents harmful solid useless production, still through chlorine remove device's setting, has saved the acid -base raw materials, got rid of moisture unnecessary in the solution through the solution enrichment facility, the system has increased crystallization efficiency through the whirl densification.