NB-IOT intelligent padlock

The NB-IOT intelligent padlock is characterized in that a locking hole is formed in one side of the top of a lock shell, and an extending step is arranged on the other side of the top of the lock shell; the lower lock body is fixed at the bottom opening of the lock shell, a closed cavity is formed between the lower lock body and the lock shell, the upper lock body is arranged in the closed cavity, the upper lock body is provided with a lock hook mounting hole, the long arm end of the lock hook is inserted into the lock hook mounting hole, and the short arm end of the lock hook is inserted into the locking hole; the long arm end is fixedly sleeved with the rain-proof cap, the extending step is sleeved with the rain-proof cap, a limiting ring groove is formed in the long arm end, the set screw penetrates through the side wall of the extending step to be located in the limiting ring groove, the limiting steel ball is fixedly arranged in the upper lock body, and a first sliding groove is formed in the side wall o