Abaqus was utilized to establish the a twodimensional axisymmetric finite element model of the seal structure of the cable stuffing boxes,the deformation and mechanical behavior of the stuffing box packing in the mounted state were analyzed.The factors influencing sealing performance of the stuffing box were studied,such as the axial precompression of packing,magnitude of interference,friction coefficient of contact surface.Results show that precompression has a large influence on axial displacement of packing,radial displacement of contact surface and radial contact stress,and all of which are increased with the increasing of precompression.When precompression is constant,magnitude of interference has little influence on axial displacement of packing,while at the specified axial location,with the increasing of magnitude of interference,the radial stress of contact surface is increased linearly.Friction coefficient has little influence on radial contact stress,and radial contact stress is increased slightly with the increasing of friction coefficient.