Among the variety of post and core materials, fiber post is getting more and more popular because of its excellent physical and mechanical characters, superior aesthetics properties. However, it also has some limitations. In the restoration of damaged teeth, there should be more dentin ferrule, and the different designs of ferrule affect the retention, stability and root fracture resistance of teeth restored with fiber posts. The purpose of this article is to give a literature review of the effect of ferrule on teeth restored with fiber posts.