Key locking structure

The utility model discloses a key locking structure, which belongs to the technical field of door lock products and comprises a lock body, a lock cylinder is arranged inside the lock body, a placing groove is arranged on one side of the lock cylinder, the lock cylinder is rotatably connected with a lock cylinder shifting block, a main spring bolt plate is arranged on the right side of the lock cylinder, a separating shifting plate is rotatably connected on the left side of the main spring bolt plate, and a sliding groove is arranged on the main spring bolt plate. A spring bolt shifting block assembly is arranged in the sliding groove in a sliding mode, three dead bolts are fixedly connected to the top end of the main spring bolt plate, and a check block is fixedly connected to the other end of the main spring bolt plate. According to the utility model, the lock cylinder shifting block and the stop block are arranged, and the lock cylinder shifting block is propped against the arc surface of the stop block aft