An electronic lock includes a lock shell, a rope winded disc, a lock rope head, a sliding lock block, and a controlling and driving device. The lock shell has a first lock hole and an insertion hole. A lock rope is winded at the rope winded disc, and the lock rope is operatively pulled out from the rope winded disc or returns inside the rope winded disc. The lock rope head is inserted into the insertion hole and connected with one end of the lock rope. The sliding lock block is disposed inside the lock shell through a spring, and one end of the sliding lock block is placed in the first lock hole.