The invention provides a pigtail protection device comprising a box body, wherein the box body has a space for receiving optical cables, prefabricated optical cables are arranged on the box body, thebox body is provided with a cabinet door having opening and closing states, several fixing pieces are arranged on the first side of the box body, each of the prefabricated optical cables is arranged to be wound around corresponding fixing pieces, and fiber outlet grooves for the prefabricated optical cables to pass through are formed in the second side of the box body. The pigtail protection device provided by the invention has the beneficial effects of arranging the fixing pieces in the box body, so that the optical cables are not directly bent through guidance of the fixing pieces, the optical cables are well protected, meanwhile, each of the optical cables corresponds to one fixing piece to make the optical cables in the box body neat, ordered and beautiful, and debugging and later maintenance are facilitated.