Lock and fire hydrant box

The utility model provides a lock. The anti-theft lock comprises a lock body assembly, a spring bolt, a key and two locking rods, the spring bolt is telescopically arranged on one side of the lock body assembly, one locking rod is telescopically arranged at the top of the lock body assembly, the other locking rod is telescopically arranged at the bottom of the lock body assembly, and the key is inserted into the lock body assembly and rotates forwards and backwards by a preset angle to drive the spring bolt and the two locking rods to correspondingly stretch out and draw back so as to achievelocking or unlocking. The utility model further provides the fire hydrant box provided with the lock. The lock disclosed by the utility model is arranged on a box door of the fire hydrant; the lock body assembly, the spring bolt, the two locking rods and the key are matched. The lock tongue and the two locking rods achieve locking at the same time, a stable locking plane is formed through three acting points, the structur