The utility model discloses a wide load heat recovery system, including the steam turbine that is connected with the generator, condenser and boiler are connected to the steam turbine, and high pressure feed water heater connects the oxygen -eliminating device through first boosting equipment, and condenser connected second boosting equipment, second boosting equipment pass through low pressure feed water heater and connects the oxygen -eliminating device, and the steam turbine passes through first boosting equipment of boosting tube coupling and second boosting equipment. The utility model discloses set up two boosting equipment, when the usual operation at part load of unit, these two equipment do not put into operation into operation, and unit operational economy is higher, and when needs improve the power of generator, carry out two heating through these two equipment utilization main steams to the condensate water to improve condensate temperature, this moment high pressure feed water heater and low pressure feed water heater bring to rest is no longer drawn gas in the steam turbine, reaches the purpose that improves generator power, has both guaranteed the peak regulation ability of electric wire netting, makes long -time running operating mode energy consumption level reduce again.