本文从流动浆体中的固体粒子与清水之间的动量传递分析入手，提出了水平管道内沉降性浆体流动速度分布与浓度分布之间的理论关系及其速度分布的理论计算方法，并将其理论计算结果与一些已公布的试验结果进行了对比，检验证实了理论分析方法及理论分析结果的正确性及具有的普遍意义。 This paper starts with the analysis of the momentum transfer between the solid particles in the flowing slurry and the clean water and puts forward the theoretical relationship between the velocity distribution and the concentration distribution of the sedimentary slurry in the horizontal pipe and the theoretical calculation method of the velocity distribution. The theoretical calculation results are compared with some published test results. The test verifies the correctness and general significance of the theoretical analysis methods and theoretical analysis results.