Abstract: The influences of different processing parameters on the spining force of hot neck-spining formation of the bottle pressure vessel has been analyzed by numerical simulation. The results show that during the hot neck-spining forming process of the bottle pressure vessel, the spining force decreases with the increasing of temperature and increases with the increasing of feed ratio; Radial spining force in every pass is very close to the total spining force, and the relationship among the three components of spining force is: tangential spining force < axial spining force < radial spining force; The spining force increases gradually with the increasing of spinning pass.