本文对纵向多层淹没射流水垫塘流态进行了数值模拟，将能量方程耦合于ＳＩＭＰＬＥ算法中使计算结果与实测值更为接近．文中分析、比较了单层和多层射流入塘后的水流结构及消能机理．研究表明，由于多层射流的能量耗散加快且分布均匀化和“动水垫”效应，使其在充分发挥水垫消能作用，提高消能率和降低塘底动水荷载及冲剧等方面明显优于单层射流． In this paper, the numerical simulation of flow field in a multi-layered submerged jet plunge pool is carried out. Coupling the energy equation with the SIMPLE algorithm brings the calculated results closer to the measured values. The paper analyzes and compares the water flow structure and energy dissipation mechanism after single layer and multi-layer jet into the pond. The research shows that due to the acceleration of energy dissipation and the uniform distribution of the multi-layer jet and the effect of “moving water cushion”, it makes full use of water cushion energy dissipation effect, energy dissipation rate, Significantly better than monolayer jets.