The invention belongs to the relative technical field of domestic waste incineration and pollutant control, and discloses a pollutant removal structure suitable for domestic-waste-pyrolyzed gasification gas and a combustion device. The pollutant removal structure comprises a furnace body, and a chamber is formed in the furnace body. A support plate is arranged in the chamber, the chamber is divided into an upper chamber and a lower chamber by the support plate, and the upper chamber communicates with the lower chamber. The pollutant removal structure further comprises a calcium-based ejector and a primary air pipe, wherein the primary air pipe is arranged on the furnace body and communicates with the lower chamber; the calcium-based ejector is adjacent to the primary air pipe and is used for ejecting calcium-based materials into the primary air pipe; and the primary air pipe is used for enabling the domestic-waste-pyrolyzed gasification gas and primary air to enter the lower chamber and to be desulfurized and dechlorinated at above 850 DEG C. The pollutant removal structure reduces dioxin emission, solves the problems of contamination and dust stratification, and has the advantagesof simple structure and high flexibility.