The utility model provides a device for cutting on material extrusion molding equipment of brazing of copper base, relates to the material processing technology field of welding, its characterized in that: the on-line screen storage device comprises a base, be equipped with the extrusion molding case on the base, be equipped with two discharge gates on the said extrusion molding case side by side, the discharge gate top is equipped with the cutting knife, installs the connecting rod on the cutting knife, the connecting rod is connected on the dead lever of extrusion molding case, said connecting rod one side is equipped with little air pump, and stingy pump is installed on the base, and little air pump passes through the ejector pin to be connected on the connecting rod, said base one side is equipped with collects the box, collects the box and establishes in the discharge gate below the utility model discloses rational in infrastructure, the cutting is convenient, and is simple to use.