Compared to traditional machined spiral bevel gear, the hot precision forged one has better mechanical property, longer service life, less material consumption and other advantages. A hot precision forging process consist of upsetting, pre-forging, wed punching and finish-forging was developed, and a set of closed precision hot forging die with a pothole in the middle to divide metal flow was designed. The FEM software Deform-3D was applied to predict some important information during the forging process, such as material flow, forging load, grain flow orientation etc.. Spiral bevel gear with diameter of 165 mm was successfully forged on 1000t clutch operated screw press, thus the feasibility of the process and the validity of numerical simulation were proved. This may provide useful guidelines and reference for further research and mass production.