Direct efficiency test method was used for fine powder separator commonly.The test method was complicated and test accuracy was affected by weather
pipe layout
measuring location and so on.A new indirect method was presented to test the separator efficiency by comparaing the deferent boiler heat load before and after the coal pulverizing system commission.The testing method was used for 4th boiler in Baling Petrochemical Division and it showed that the test result was similar to the result of standard recommended method.