Abstract: Aiming at a late-model of crown gear pair with transition gear sleeve, the crown gear pair model was established in the three-dimensional modeling software. The meshed model was imported into the finite element software ANSYS for analysis, and the meshing state and mechanical properties of crown gear pair were investigated, and the influence of pressure angle on the meshing mechanical properties of crown gear pair was discussed. The results show that the maximum stress in the conventional gear pair structure occurs on the internal gear shaft sleeve, and the maximum equivalent stress is 1 115.30 MPa. The maximum equivalent stress in the new gear pair structure occurs on the internal tooth surface of the transition gear sleeve, and the maximum equivalent stress is 1 097.00 MPa. Compared with the conventional gear pair structure, the maximum equivalent stress on the external gear shaft sleeve and the internal gear shaft sleeve of the new structure is reduced, and the maximum stress on the internal gear shaft sleeve is reduced by 63.59%. In the new structure, with the increase of pressure angle, the stress concentration position on the external gear shaft sleeve shifts from the center of tooth root to both sides, the meshing area between the external gear shaft sleeve and the internal teeth of the transition gear sleeve increases correspondingly, and the stress on the internal teeth of the transition gear sleeve decreases. In the given pressure angle range, the internal gear shaft sleeve can maintain small equivalent stress and strain, which has a good protective effect on the internal gear shaft sleeve at the roll end with high manufacturing cost.