Novel anti-theft door lock

The invention discloses a novel anti-theft door lock. The anti-theft door lock comprises an outer shell, a lock frame, a spring bolt, an electric motor, a transmission part, an upper pull rod and a lower pull rod; the spring bolt, the electric motor, the transmission part, the upper pull rod and the lower pull rod are assembled on the lock frame, the shell seals the lock frame, a lock ring is further included, the lock ring is provided with an opening, the lower end of the lock ring is movably connected with the lock frame, the upper end of the lock ring is movably connected with the upper pull rod, the lower portion of the lock ring is bent, the upper portion of the lock ring is a straight rod, the bending rod is in shaft hole connection with the straight rod, and the lock ring is combined with the lock frame and the pull rod to form a connecting rod mechanism. The lock is simple in structure, and practical, the lock ring structure is added, and locking safety of the anti-theft door lock can be effectively i