Automatic marking machine for container packaging

The utility model relates to the technical field of packaging, and discloses an automatic marking machine for container packaging, which comprises a base, a first mounting cavity is arranged in the base, a supporting block with one end extending to the top of the base is arranged on the inner top wall of the first mounting cavity, and a mounting seat is arranged on the top of the supporting block. According to the automatic marking machine for container packaging, a double-shaft servo motor is started to drive a laser generator to move upwards, so that the height of the laser generator is adjusted, container packaging of different sizes can be marked conveniently, practicability is improved, secondly, a positioning block can be driven to move upwards by screwing a hand wheel, and the positioning block is prevented from moving upwards. When the laser generator is dismounted, the positioning block is moved out of the interior of the positioning groove, at the moment, the mounting block can be pulled out of the