Automatic laser alignment device for machine tool

The invention discloses an automatic laser alignment device for a machine tool and relates to the technical field of machine tools. The automatic laser alignment device comprises the machine tool and a laser device arranged on the machine tool. A groove is formed in the top of the machine tool, auxiliary alignment devices are arranged in the machine tool, limiting assemblies for limiting the auxiliary alignment devices are arranged in the machine tool, and each auxiliary alignment device comprises a push plate. The push plates penetrate through the top of the machine tool and are connected with the machine tool in a sliding manner, the bottoms of the push plates are installed on the tops of transverse plates in a sliding manner, the left sides of the transverse plates are fixed to the interior of the machine tool, the left sides of the push plates are fixed to one ends of springs A, the other ends of the springs A are fixed to the interior of the machine tool, and pressing plates are fixed to the push plates.