The invention discloses a preparation method of a micro-
prism working mould with a subsequent continuous
processing function, relating to micro-
prism reflection films. The preparation method comprises the following steps: adding water into an
electroforming tank, and adding
nickel sulfate hexahydrate and
nickel chloride in sequence; adding
boric acid into hot water, boiling, adding lauryl
sodium sulfate, dissolving, pouring into the
electroforming tank, adding
saccharin and 1,4-butynediol into the
electroforming tank, filling up water in the electroforming tank, and adjusting the pH value to be 4.0-4.4 to obtain an electroforming liquid; continuously
copying a
metal master mould on a PVC material to obtain a sheet-like template with a micro-
pyramid structure on one side, wherein each side length of the micro-
pyramid of the sheet-like template is 100-200 microns; keeping the micro-
pyramid structure on the inner side, defining a
barrel by the sheet-like template, performing
butt welding to obtain an annular template, and performing electroforming pre-treatment on the inner surface of the annular template; putting an
anode nickel plate into an annular
anode basket, and connecting to an
anode; and putting the annular template into the electroforming tank, connecting to a
cathode while ensuring that the
cathode is concentric with the anode, electroforming, and performing cathodic de-moulding to obtain the micro-
prism working mould.