In order to meet the demand of more flexible distribution and energy saving in blast furnace production,a method of improving the distribution accuracy of blast furnace based on time method was proposed.Mainly through PLC programming optimization,the controllable precision was improved from 0.5 to 0.1.PLC program optimization was completed and successfully run on line.Production operators quickly mastered the operation method and used it,saving the amount of central coke.It is feasible to improve the precision of blast furnace distribution based on time method,which can meet the precise requirements of blast furnace production.