The invention discloses a household garbage incineration fly ash low-temperature pyrolysis and resource utilization method, which comprises the steps: unloading fly ash from a storage tank, feeding into a pyrolysis furnace, and carrying out low-temperature pyrolysis; discharging from the pyrolysis furnace, detecting the total residual amount of dioxins in the fly ash pyrolyzing product, feeding the fly ash pyrolyzing product with the total residual amount exceeding 50 ng-TEQ/kg back to the pyrolyzing furnace, continuously pyrolyzing, and preparing the qualified fly ash pyrolyzing product withthe total residual amount not exceeding 50ng-TEQ/kg into a mine filler, wherein the mine filler is prepared by stirring a cementing agent, aggregate, water and an additive, and the cementing agent isprepared by homogenizing a qualified fly ash pyrolysis product, slag, slag and industrial byproduct gypsum; and sequentially feeding the flue gas generated in the pyrolysis furnace into a secondary combustion chamber, a waste heat recovery system, a deacidification system and a dust removal system, and discharging until atmospheric pollutants in the flue gas meet the national emission standard. According to the method, resource utilization of the fly ash is achieved, the absorption capacity is high, the cost is low, and environmental safety is guaranteed.