The thermalfluidsolid coupling method was used to study the dynamic characteristics of flow distribution plate of highpressure intravane type pump. The stress and strain of flow distribution plate of highpressure intravane type pump were discussed under changing working pressures,speeds and oil temperatures. And the effect of the solid phase parameters on the performance of the flow distribution plate was discussed. The strain and stress of the flow distribution plate are mainly concentrated near the oil pressureequalizing groove for the middle cavity of the vane in the oil absorption area as shown in the deformation and stressstrain diagrams, while the deformation not occurs in the oil drainage area.The change of working pressure and oil temperature have obvious effects on the distribution of deformation and stress of the flow distribution plate in highpressure vane pump, while the changes of rotation speed and solid particle parameters basically do not affect the deformation of the flow distribution plate. Therefore，when designing flow distribution plate of highpressure intravane type pump，the influence of working pressure and oil temperature must be fully considered. The conclusion provides reference for the design of flow distribution pairs of the highpressure intravane type pump.