Abstract: It is important for the recycle of uranium to increase the production of uranium metal evaporation by the electron gun with high temperature in AVLIS. To decrease the pollution of impurity and the erosion of the crucible caused by the molten uranium, the heat transfer character of the crucible pool with the solid and liquid interface is studied by solving the Navier Stocks equation and the energy equation according to the practice of the uranium recycling system. The research emphasizes on the relation between the heat transfer character and the interface geometry, the crucible height, the heat conducting factor, the parameter of the electron gun. All the studies show us more about the heat transfer character of the pool and give us more parameter for the design of the crucible.