Polysiloxane has excellent waterproof and antifouling performance and high strength because of its special —Si—O— structure. Moreover, it possesses characteristics of organic polymers and inorganic materials due to its special organic-inorganic structure. Thus, polyssiloxane has outstanding advantages in the field of metal corrosion prevention. Based on the latest research progress on the corrosion resistance of coatings improved by polysiloxane, the anti-corrosion protection properties of polysiloxane coating were summarized from the aspects of molecular structural modification of polysiloxane, decoration by inorganic nanoparticles, hyperbranched polysililoxane and self-repair polysiloxane. And the application of polysiloxane in corrosion prevention was prospected.