For finding out the wearing condition of the concrete pump distributing valve by concrete when the concrete pump was working, the numerical simulation study on the fluid field of the concrete pump distributing valve was carried out.The model of the concrete pump distributing valve was established in SolidWorks, being meshed and its boundary conditions were defined in GAMBIT, and the calculation was carried out in Fluent, the fluid field of the concrete pump distributing valve was studied. The result provides some theoretical and practical value for the design and the wear detection of concrete pump distributing valve.