The high-speed angular cantact ball bearing under load at three direction is used widespread in industry, and the analysis of it’s dynamic character is the base of bearing design and research of spool system. Based on the analysis of conventional calculation method about the dynamic character of high-speed angular cantact ball bearing , a new calculation method is put forward which simplifies the rolling ball under load at 3 direction into two hinge short bar according to the change features of the contact angle under high speed and the deformation of rolling ball and raceway. The specific form of stiffness matrix is given and the solving process by setting initial value of the load at three direction is discussesd. The complexity because of the variable coupling in the conventional Newton-Raphson method is avoid , and the congervence property is improved by this method. An example indicates that the method in this paper is feasible, and can replace the conventional quasi statics method.
