Optical fiber connector

The utility model provides an optical fiber connector. The connector comprises a plug and a socket, the plug comprises a connecting nut, a first shell, a first insertion core assembly and an insertioncore butt joint assembly. The first shell is contained in the connecting nut. The first insertion core assembly is accommodated in the first shell. The insertion core butt joint assembly comprises amovable cover plate and a ceramic sleeve which are connected with the first housing. The movable cover plate is located on the side, facing the socket, of the first insertion core assembly, a containing cavity is formed in the movable cover plate, the ceramic sleeve is limited in the containing cavity, through holes communicated with the ceramic sleeve are formed in the two ends of the movable cover plate, one end of the first insertion core assembly extends into the ceramic sleeve, and the other end of the first insertion core assembly is connected with the optical cable; the socket comprisesa second shell connected w