The clean incineration of municpal solid wastes（MSW） in ciculating fluidized bed （CFB） incinerators requires the temperature in furnace of the entire incinerator to be controlled in a certain range. Based on test data in practical operation of a CFB MSW incenerator

a mathematic model of temperature distribution in furnace of a CFB MSW incinerator has been established

and a relative gain matrix of the system being calculated

and reasonable match of the furnace temperature controlling variables

as well as reasonable strategy of decoupling control and of feedfront control

being put forward on the said basis. Simulation results show that the said strategy to be effective

having important reference value for controlling CFB MSW incinerators.