Abstract: Objective: To analyze the stress distribution of remaining dentin after restored maxillary middle incisor with different forms of zirconia posts by simulating the mechanics of body tissue with three dimensional finite element analysis. Methods: According to the standard data of adult male maxillary incisor, three-dimensional finite element models of zirconia post-and-core with parallel post, tapered post or post tapered at one end repairing for maxillary middle incisor were established and meshed using the ANSYS 11.0 software. By loading boundary conditions, the main parameters of the models were set and the static load was applied. The distribution laws of Von Mises stress in dentine were analyzed. The effect of the posts with different forms on residual dentine was evaluated. Results: The models were successfully established. The dentin stress of cylindrical post and tapered post gradually increased to the peak along the dentin boundary to the tooth neck, and the maximum dentine stress of post tapered at one end was in the apical third. The dentin stress of taper post was greater than that of cylinder post, which increased with increasing taper degree. Conclusion: The stress value of cylindrical post was lower than that of taper post. The stress value of post tapered at one end was concentrated in the apical third. Cylindrical post was the best design when choosing zirconia materials.