In order to further optimize the structure of spherical bearing with groove,the model of spiral groove and annular groove bearing was established,and the influence of the number of spherical bearing grooves and groove radius on the mechanical properties of spherical bearings was analyzed by using finite element software.The results show that,for the spherical bearing with spiral groove,the maximum stress and volumetric strain are increased with the increasing of the number of spiral grooves,while the maximum stress value is decreased and the maximum volume strain value is increased with the increasing of the radius of spiral groove.The displacement of spiral groove spherical bearings is easy to be increased when the number and radius of spiral grooves are too large or too small.For the the spherical bearing with annular groove,the maximum displacement is increased with the increasing of groove number and radius,and the maximum stress and volume strain are increased with the increasing of groove number and the decreasing of groove radius.The maximum displacement,maximum stress and volume strain of the spiral groove spherical bearing are larger than those of the annular groove spherical bearing,but the displacement distribution of the annular groove spherical bearing changes rapidly and has a large range,the pressure distribution is uneven,and the pressure peaks appear many times,easily causing stress concentration phenomenon.Compared with the annular groove spherical bearing,the spiral groove spherical bearing with groove number of 5 and radius of 2.5 mm has the smallest maximum displacement,and relatively reasonable distribution of deformation.