Abstract: The influence of wad different positions, minimum thicknesses, slopes and transition fillets on the precision forming of high-speed train disk hub was studied by using Deform-3D software. The results show that when the wad position h is increased from 75 mm to 85 mm, the deformation force of final forging increases gradually. When the value of h is 85 mm, the filling effect of the upper and lower end faces of the thin-walled hub is the best. When the minimum thickness of wad h″ increases from 8 mm to 11 mm, the deformation force of final forging decreases gradually. When the wad slope α increases from 3° to 5°, the deformation force of final forging decreases gradually when the transition fillet of the wad R increases from 20 mm to 30 mm, the deformation force of final forging reduces. When the height of the preform increases from 90 mm to 96 mm, deformation force of final forging and the maximum equivalent stress of the forging body decrease gradually.