Abstract: In the light of uncontinuity flame and insufficiency burning of burner of 4650kW heater, the relative modified indexes to solve these problems are analyzed and put forward.WKMS 50 Weishaupt(made in Germany)burner is used tO replace the original 4650kW heater.The application results show that WKMS 50 Weishaupt burner modified, with a highly automatic level, eliminates the effect of burning delay and improves burning performance of heat medium heaters under variable operating conditions.