Abstract: The upward-slicing cut and fill stoping method was used in a mine which has higher demand on the strength of filling body.Based on one-dimensional stress wave theory and dynamic load resistance characteristics，the compressive strength of filling body should be higher than 1.2 MPa.The filling materials mixing ratio was the key factor which influenced the technical and economical indexes.To seek for the optimum filling ratio，and according to the actual conditions in mining and beneficiation，the four-factor three-level uniform design method was used to study the influences of paste concentration，total tailing-pond tailing ratio，cement-sand ratio and the additive amount of sodium sulfide to the strength and condensation of filling body.The results showed that：On the premise of meeting the filling strength，when the additive amount of sodium sulfide is 0.4%，cement-sand ratio should be controlled at 1∶8，plant-pond tailings ratio at 8∶1 and the paste concentration at around 77%; when the additive amount of sodium sulfide is 0.6%，cement-sand ratio should be controlled at 1∶9，plant-pond tailings ratio at 8∶1 and the paste concentration at around 76%.

Key words: Filling strength, Condensation time, Mixing ratio, Uniform design