The new type of hydraulic slide valve based on interference fit was proposed to fit for the aviation environment with wide temperature changing following -55~150 ℃. The core idea was using grooved design on the valve barrel’s cylindrical surface to connect and control fluid. The interference fit between the shell and valve barrel was used to achieve sealing effect. Compared with traditional oring sealed slide valve, in the new slide valve,conventional sealing structure was completely abandoned.The difficulty of valve manufacturing and assembly was greatly reduced. What’s more, the new slide valve has smaller volume, light weight, high reliability, good maintainability and working stability. However, due to the heat bulging and cold shrinking phenomenon of materials, especially combination between different materials, the seals design of the over surplus quantity would have a severe effect on the performance of the hydraulic valve.Different situations of structure field and flow field with changed different temperature were researched by using simulation analysis of FLUENT and finite element method aiming at different material combinations of interference fit type hydraulic slide valve.Lastly, a new interference fit type hydraulic slide valve was designed by using proposed method and experimental verification was made completely.