The invention discloses a full-closed dustproof five-prevention lock used for electric power. The full-closed dustproof five-prevention lock comprises a lock body. A lock cylinder is arranged in the lock body. A lock beam is installed on the top of the lock body. A lock hole for an electronic key to be inserted therein is formed in the bottom of the lock body. A set of recognition holes corresponding to the lock hole in position are formed in the lower portion of the front face of the lock body. The lock body is tightly sleeved with a rubber sleeve. Protrusions facing the recognition holes are integrally arranged at the positions, corresponding to the recognition holes, of the rubber sleeve. The protrusions are used for closing the recognition holes. By means of the full-closed dustproof five-prevention lock, the recognition holes can be prevented from being blocked under the condition that the structure of the lock body is not changed, and the full-closed dustproof five-prevention lock is not influenced by the environment and is long in use time, small in investment and quick in effect. The valve is simple in structure and reasonable in design, the trouble of transforming the lock body is omitted, and cost is greatly saved.