Based on the actual investigation and analysis of drilling samples, the deposition law of upstream tailings pond is summed up. The main data source is laboratory test data, including the system particles analysis of 11drilling samples. The data is processed by graphic method. Results show that: along the vertical direction, with depth increasing, the particle size of the accumulation body generally dwindles; along the horizontal direction, the farther from the outfall, the smaller the particle size is. This article provides basic reference for deeply understanding the horizontal and vertical deposition law of tailings pond and further p further analysis of tailings dam stability.%本文根据实际调查和钻孔取样分析研究，总结上游式尾矿库的沉积规律。数据来源以室内试验数据为主，包括11个钻孔样品的系统颗粒分析。以图解法处理数据。结果证明：沿垂直方向，随深度增大堆积体粒径有总体变小的趋势；沿水平方向，距离排放口越远，粒径越小。本文研究结果为深入认识尾矿库水平及垂直方向的沉积规律和进一步开展尾矿坝稳定性分析，提供了基础性依据。
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