Reverse fine cutting die and method for automotive specular metal decorating part

The invention relates to a reverse fine cutting die and method for an automotive specular metal decorating part. The reverse fine cutting die comprises an upper die base, a lower die base, a pressingand locating mechanism and a reverse inclined wedge mechanism, and the pressing and locating mechanism comprises an upper die fixing base fixed to the lower side of the upper die base, and a lower diefixing base fixedly installed on the lower die base; a lower die core used for supporting the decorating part is installed on the upper side of the lower die fixing base, and a material pressing baseis installed on the lower side of the upper die fixing base; and a material pressing plate used for pressing the decorating part is installed on the lower side of the material pressing base, and a cutter controlled by the reverse inclined wedge mechanism to rise for punching the end of the decorating part is arranged on the rear side of the lower die core. The reverse fine cutting die for the automotive specular metal deco