The invention relates to a technology for producing a cover plate of a vehicle trunk, comprising the following steps of: flat-placing a planar blanket into a cutting mold, and cutting the planar blanket into a required shape; fixing the planar blanket on a fit mold, wherein the front face of the planar blanket faces downwards, spraying polyolefin glue on the back face of the planar blanket and the back face of a substrate, and applying the back face of the planar blanket onto the front face of the substrate, to obtain a crude product of the cover plate of the vehicle trunk; applying the front face of a cover plate material of the vehicle trunk onto the back face of the substrate in the crude product of the cover plate of the vehicle trunk, to obtain a semi-finished product of the cover plate of the vehicle trunk; and finally pressing the semi-finished product of the cover plate of the vehicle trunk in a pressing die, to form the cover plate of the vehicle trunk after pressing. The method of the invention has advantages of simple technology, fewer operation steps, no harmful substance generation in a production process, environmental protection and no pollution, reduces manufacturing cost, greatly raises vehicle disassembling precision requirement of the cover plate of the vehicle trunk, and raises sound insulation effect.