Overtemperature problems of No.1 2 boilers' reheaters had existed for a long time of period in Zhanjiang Power Plant,its main cause was heat deviation.Through the analyses of testing data and successful retrofitting experiences with the other similar type corner tangential combustion,the retrofitting scheme of reheater and arc tangential of burners was obtained,and through the combustion adjustment and tests,the more reasonable optimized operation mode of boiler combustion was found out and finally the overtempera -ture problems of No.1 2 boiler' s reheaters in Zhangjiang Power Plant were resolved.