Protection device for communication cable joint

A protective device for a communication cable connector comprises an outer shell, an inner shell is detachably installed on the inner side of the outer shell in a matched mode, and the protective device is characterized in that the outer shell comprises an upper shell body and a lower shell body, the upper shell body and the lower shell body can be installed together in a clamped and matched mode, internal threads are arranged on the inner circumference of the outer shell, and the inner shell comprises a front shell body and a rear shell body; the front shell and the corresponding rear shell can be matched in an inserted mode, external threads are arranged on the periphery of the inner shell, and the inner shell and the outer shell can be installed in a threaded fit mode. According to the utility model, the structure is simple, the conception is ingenious, the outer shell and the inner shell are respectively spliced through simple plug-in fit, the outer shell is installed on the inner shell in a threaded fit