The utility model relates to an incinerator wall arrangement structure suitable for a household garbage incineration power plant. Three-stage mechanical reciprocating grates are utilized by an incinerator wall for incinerating household garbage. An incinerator wall body is divided into different areas according to functions of the incinerator wall. Fire resistant and heat insulation materials adapting to area characteristics are utilized by the same area to perform combined arrangement to achieving the effect of keeping normal operation of a whole waste incinerator. On the condition that combustible basis in the waste in the incinerator is ensured to be burnt out completely, local high temperature areas occurred in the incinerator are reduced, the phenomenon that ash content in fuel softens and develops continuously to liquid state is controlled so that serious coking phenomena of the incinerator wall of the high temperature areas of combustion section grates are effectively reduced or avoided, and the problem that the incinerator stops working due to the coking inside the incinerator is solved. Compared with the incinerator with an insulation incinerator wall structure, an air cooled wall is added, so that the decoking period inside an incinerator body is prolonged from four months to six months or even longer. In addition, the service life of the incinerator can be prolonged by more than 10%.