The stiffness of the tilting pad pivot will change when using different pivot forms,which will cause the change of the dynamic forces of the base transmitted by the bearing.The vertical static stiffness of tilting pad pivot was simulated and calculated for common pivot forms of point support,line support and ball support,and the relationship between the pivot forms and the static stiffness of pivot was analyzed.The results show that the vertical static stiffness of the point support is larger than that of the line support with the same diameter,and the vertical static stiffness of the line support is larger than that of the ball support.For line support, when the diameter of the semicircular surface of bearing seat is greater than that of the pad pivot,the vertical static stiffness will be significantly decreased,and the larger of the diameter of the semicircular surface of bearing seat,the more obvious the decreasing of vertical static stiffness is.For ball support,when the diameter of the ball on the surface of pads is larger than that of the ball of pivot,the smaller the pivot ball diameter is,the more obvious of the decreasing of vertical static stiffness is.