Laser cutting machine for storage tank machining and machining method

The invention relates to the technical field of laser machining, and discloses a laser cutting machine for storage tank machining, which comprises a lathe bed and a laser cutting assembly arranged on the lathe bed, and a fixed working platform and a detachable working platform are arranged on the lathe bed. The fixed working platform and the detachable working platform are horizontally arranged and spliced in the length direction of the machine tool body to achieve plate machining, a tank cover machining station located below the detachable working platform is arranged in the machine tool body, and a lifting table is arranged in the tank cover machining station. The fixed working platform is provided with a bearing assembly used for bearing the detached detachable working platform. Due to the fact that the detachable working platform and the tank cover machining station share one occupied area, the occupied space of the tank cover machining station is saved, under the condition that the ...