Abstract: In order to determine the research method of low-cost，safe and efficient disposal of municipal solid waste incineration fly ash (MSWI)，we conducted the flow performance and strength test of filling material which were made of slag powder，slag powder，gypsum，incineration fly ash.The optimal mixing ratio of cementitious material was determined according to the strength of cement filler.The microstructure and hydration products of the cement paste were analyzed by X-ray diffraction (XRD)，infrared (FTIR) and scanning electron microscopy (SEM).The results show that when the content of waste incineration fly ash is 15%，the content of steel slag is 4%，the content of desulphurization gypsum is 14% and the slag content is 67%，the fluidity of the slurry is 260 mm，which satisfies the liquidity requirement of the self-flow cementation filling，and the compressive strength of the filling material is 24.54 MPa for 28 days，which satisfies the requirement of filling strength of the mine.The leaching concentration of heavy metal ions for 28 days was all lower than that of drinking water.The hydration products of Metallurgical slag-incineration fly ash cementing material are mainly ettringite，C-S-H gel and Friedel salt.

Key words: Waste incineration fly ash, All solid waste, Cementation filling,Slag