异重流是自然界中普遍存在的现象，水库泥沙运动中更是经常发生，因此研究异重流的潜入条件有着重要的实践意义。已有很多人对此作了多方面的研究工作。本文对水库异重流的潜入条件进行了理论分析，并用立面二维数学模型作了数值模拟，探讨了影响异重流潜入条件的几个重要因素。 Heterogeneous heavy flow is a common phenomenon in nature. It is more common in reservoir sediment movement. Therefore, it is of important practical significance to study the infiltration conditions of heavy flow. Many people have done a lot of research on this. In this paper, the infiltration conditions of gravity flow in reservoirs are theoretically analyzed, and two-dimensional mathematical models of the facades are used for numerical simulation. Several important factors that affect the inflow conditions of heavy flows are discussed.