The utility model belongs to the technical field of graphite alkene the technique of warming up and specifically relates to an automatic assembly line of printing big envelope warms up graphite alkene, the large -scale motor assembly jig comprises an operation bench, first material loading unit passes through conveyer belt transport mechanism and first dnockout unit connection, printing unit's opposite side passes through conveyer belt transport mechanism and stoving unit connection, and second material loading unit passes through conveyer belt transport mechanism and the unit connection of second dnockout, be artifical blowing unit between the two -layer conveying platform, and two -layer conveying platform's afterbody passes through conveyer belt transport mechanism and die -cut and headbutt fusion unit connection, die -cut and head butt fusion unit connects the unit connection through conveyer belt transport mechanism and two long fusing of margins, afterbody butt fusion unit passes through conveyer belt transport mechanism and pulling -on piece unit connection, the utility model discloses to print, the big envelope through the combination to reach make rational use of resources, energy saving, realization high automation are high, production efficiency is high mesh.