Abstract: In order to obtain the reasonable ratio of high concentration cementation stowing materials for coal mine, cement, fly ash, slurry concentration and curing time were taken as variable parameters in this paper. The effect of four factors such as curing time, cement content, fly ash content and slurry concentration on filling body strength were explored with orthogonal experiment method, and the effect of three factors such as cement content, fly ash content and slurry concentration on filling body slump. The results reveal that the first influence of filling body strength is curing time and the last one is fly ash content; the first influence of slump is cement content and the last one is slurry concentration. And the results reveal that the proportion of cement content is 10%, the fly ash content is 20%, the slurry concentration is 80% and the curing time is 28 d, which is the optimum selection. And the compressive strength of filling body is 4.68 MPa, the slump is 243 mm, which can meet the requirements of filling mining.