Dustproof cap of optical fiber connector

The utility model relates to the field of optical fiber connectors, in particular to a dustproof cap of an optical fiber connector. The dustproof cap comprises a plug cover (1) and a plug body. The plug cover (1) and the plug body are integrally formed. The plug body comprises a plug head and a plug tail (2). The plug tail (2) is in a circular truncated cone shape. The bottom face of the plug tail (2) is connected with the plug cover (1). The plug head comprises two portions, namely, the first head portion (3) and the second head portion (4). The first head portion (3) and the second head portion (4) are in a circular truncated cone shape. The bottom face of the first head portion (3) and the bottom face of the second head portion (4) are connected and are the same in diameter. The top face of the first head portion (3) and the top face of the plug tail (2) are connected. The dustproof cap of the optical fiber connector can be firmly fixed and conveniently inserted in and plugged out.