Abstract: Tailing filling mining method is used in the third phase of the project of Shirengou Iron Mine of Hebei Iron and Steel Group，the cost for filling is high when using cement as filling cementitious material.In order to study the feasibility of the low cost and high performance new filling cementitious material based on the solid waste，using water quenched slag as cementitious material，tests on effects of different raw materials ratio on filling-body strength was conducted.The results showed that effect of lime content on the strength of the filling-body is greater than that of gypsum；when slurry concentration is 68% and cement-sand ratio is 1∶5，lime dosage is 3% and gypsum dosage is 16%，the strength of filling body obtained is the highest，7 d compressive strength is 2.42 MPa，28 d compressive strength is 5.87 MPa，the filling body strength can match the requirement of filling mining method in Shirengou Iron Mine.The test results can provide technique basis for realization of filling cementitions material on tailings in Shirengou Iron Mine at low cost.

Key words: Iron mine, Backfill mining, Activated materials, Optimal proportion