Abstract: The purpose of this paper is to investigate the effect of the bent pipe inlet on the solid-liquid two-phase flow characteristics of centrifugal pumps through Mixture multiphase flow model and ANSYS software, and to conduct a full-flow channel numerical simulation of centrifugal pumps under three different inlet conditions with solid-liquid two-phase flow as the medium in order to obtain more accurate results.The analysis focuses on the distribution of solid particles movement in the centrifugal pump inlet section and the flow characteristics inside the impeller. The study shows that the synergistic effect of inlet bend and solid particles makes the head and efficiency of centrifugal pump have a significant decrease, with the increase in the inlet bend angle, solid particles will be concentrated towards the external wall surface of the inlet section and the end of the suction surface of the vane, the most obvious effect when the inlet bend is 60?. At the same time, the study shows that appropriate to increase the bend angle can reduce the centrifugal pump tongue radial force, but in the solid-liquid two-phase conditions, with the increase in the bend angle of the centrifugal pump internal pressure pulsation will have a greater impact.