Quickly-assembled lock cylinder

The utility model discloses a quick-assembly lock cylinder which comprises a lock cylinder body arranged on a lock cylinder hole in a penetrating mode, a boss for preventing the lock cylinder body from completely penetrating through the lock cylinder hole is arranged on the outer wall of the side, close to a key hole, of the lock cylinder body, and a positioning ring capable of being matched with the boss to enable the lock cylinder body to be fixed to the lock cylinder body is embedded in the lock cylinder body. According to the utility model, the lock cylinder can be fixed on the panel without processing a screw hole on the lock cylinder on the panel, and each part needs to be drilled and tapped for processing the screw hole, so that the time is long and the labor cost is high; the positioning ring can be produced through stamping, stamping parts are short in production time and low in cost, then the lock cylinder and the positioning ring are pressed on the panel through a tool, the production time and the