Offset-halves bearings show the better performance than ordinary radial bearings,so it is of great significance to study the static and dynamic performance of offset-halves bearings.The dynamic and static characteristic equations of offset-halves circular and the offset-halves elliptical bearings under micropolar lubrication were derived.The static performance of the bearing was obtained by the finite difference method,and the dynamic performance of the bearing was calculated by the partial derivative method.The effects of coupling number and characteristic length on the bearing performance were studied.The results show that as the coupling number increases,the bearing capacity and friction force of offset- halves circular and offset-halves elliptical bearings increase,the friction coefficient decreases,the absolute values of stiffness and damping coefficients increase,and the bearing stability improves.As the characteristic length increases,the bearing capacity and friction force of offset-halves circular and offset-halves elliptical bearings decrease,the friction coefficient first decreases and then increases,the absolute values of stiffness and damping coefficients decrease,and the bearing stability decreases.Compared to Newtonian fluids,micropolar fluids have a greater bearing capacity and a smaller friction coefficient.Micropolar fluid can increase the absolute values of the damping and stiffness coefficients of the bearing,and will improve the stability of the bearing.Compared with the offset-halves circular bearing,the offset-halves elliptical bearing has large bearing capacity and friction force,but the friction coefficient is small and the stability is better.