Abstract: Relying on Longqiao dump project, due to the high water content in the dump slope, it can not accumulate into a high slope dump. The critical slip field method is used to search the most dangerous slip surface of the slope for the slope of the waste dump. The stacking method of the waste dump is proposed. Combined with the Geo-Slope software, the safety factors under the stability evaluation of Ordinary, Janbu and Bishop are obtained. The research results show that the slope reinforced by reinforced gabion has high stability, which solves the problem of safe stacking and discharging of the waste rock and provides guarantee for the safe mining of the mine.