The invention discloses a high-temperature flue gas purification treatment device for a biomass boiler. The high-temperature flue gas purification treatment device comprises a biomass combustion boiler, a biomass fuel inlet, a flue gas outlet, a first waste heat utilization device, a flue gas treatment device, a guiding pipe, a feeding channel, a feeding hopper, an air blower, a rack, a high-temperature flue gas pipeline and a combustor; and a base is fixedly mounted at the bottom of the biomass combustion boiler, the combustor is mounted in the biomass combustion boiler, and the biomass fuelinlet is formed in the position, on one side of the combustor, of the biomass combustion boiler. The high-temperature flue gas purification treatment device is simple in structure, convenient to use,and capable of achieving energy saving and environment protection ; and preheating treatment of biomass fuel and air required by combustion is achieved, energy consumption and the cost of boiler combustion are lowered, the absorption efficiency of harmful substances can be improved through heated water, the flue gas purification effect is ensured, pollution of the biomass combustion boiler on theenvironment is lowered, the utilization rate of boiler flue gas thermal energy is increased, and practicality is higher.