The invention relates to a boiler waste gas treatment apparatus, which comprises a desulfurization dust remover, smoke pipes, a pressurization water spraying type dust remover, a cyclone dust remover, a wind suction device, a gas storage cylinder and a water box, and is characterized in that the desulfurization dust remover is connected to the pressurization water spraying type dust remover through the smoke pipe, the lower side of the pressurization water spraying type dust remover is connected to the water box through a water discharge pipeline, the right side of the pressurization water spraying type dust remover is connected to the cyclone dust remover through the smoke pipe, the cyclone dust remover is connected to the gas storage cylinder through the smoke pipe, the right side of the bottom portion of the gas storage cylinder is connected to the wind suction device, and the middle portion of the right side of a heat storage cylinder is provided with a smoke discharge pipe. According to the present invention, the boiler waste gas treatment apparatus has beneficial effects of complete purification of dust, nitrogen-containing oxides and sulfur-containing oxides in waste gas, and low cost.