Door lock

The invention discloses a door lock, which comprises a shell, a locking module, an upper cover and a lock module; the lock module is of a cam structure; the cam structure is matched with a door hook;the door lock with an upper cover state detection function further comprises a sliding block mechanism positioned between the shell and the locking module, wherein the free end of the sliding block mechanism is matched with the upper cover or the lock module; and an outer door bolt, wherein one end of the outer door bolt slides on the sliding block mechanism, and the other end of the outer door bolt is matched with a circuit switch on the locking module. A track platform mechanism is arranged on the sliding block mechanism; when the outer door bolt moves vertically, the top of the outer door bolt touches the circuit switch to change the state of the circuit in the locking module; the upper cover abuts against the sliding block mechanism, and the elastic mechanism keeps a compressed state all the time. In the embod