Double optical path laser cutting device for ultra-thick steel plate laser butt welding machine

The invention discloses a double optical path laser cutting device for an ultra-thick steel plate laser butt welding machine. The double optical path laser cutting device comprises a base; a type C trolley is installed on the base; the type C trolley is installed on the base through a C-frame transmission device; a welding machine clamp, a rolling wheel, a welding laser head, a support wheel, a head cutting mechanism and a tail cutting mechanism are sequentially installed on the type C trolley; the welding laser head is connected to a laser III through a first light guide fiber; the head cutting mechanism and the tail cutting mechanism are respectively connected with a laser II and a laser I through a second light guide fiber; a liftable cutting lower workbench is also installed on the base; and the head cutting mechanism is connected to auxiliary equipment through a high-pressure nitrogen pipeline. In the implementation process of the invention, the requirements for welding of steel plates with a large range