Abstract: Based on the matching operation principle and the constraint boundary conditions,a computation module and corresponding mathematical iteration method was proposed to resolve the supercharged boiler component matching characteristics between main boiler and turbocharged unit,where exist in the operating characteristics of heat balance and pressure balance,etc.The computational results are in good agreement with the experimental data.When considering the equilibrium running line near its choke zone can deteriorate the compressor long-lasting stability at full load,we put forward to improve the thermal match by adjusting the gas turbine flow characteristics.The results show that the capacity of turbine flow passage is reduced by 5%,the normal running line away from the compressor block operation region,its efficiency,gas turbine power capability at the same time significantly enhanced,the steam consumption of the auxiliary steam turbine reduced by 30%,thus significantly improve the thermal dynamic matching performance.This has laid a theoretical basis for the establishment o f thermodynamic matching design method of the supercharged boiler.