Abstract:Bacteriophage is a kind of virus depending on bacterium, named bacterial virus, and it can multiply in bacterium. There’re six types of Chlamydiophage discovered which are Chp1, Chp2, Chp3, Chp4, CPAR39 and PhiCPG1. Capsid proteins Vp1, Vp2 and Vp3 are three major structural proteins of Chlamydiophage. The study of Chlamydiophage will play great action on chlamydia infection therapy.