The invention discloses a method for plating the surface of a rhinestone. The method comprises the following steps: arranging a plurality of rhinestones in the same direction, and forming a plastic-suction disk by plastic suction, wherein, a plurality of absorption holes are formed on one surface of the plastic-suction disk, and the facial part of the rhinestone is embedded and fixed in the absorption hole; plating the surface of the plastic-suction disk with the embedded rhinestones with a reflection layer, wherein, the reflection layer is a silver, aluminum or chromium layer; coating the surface of the plastic-suction disk with the plated reflection layer with a protection layer, wherein, the protection layer is an anti-tarnishing paint, copper or copper-zinc alloy layer; and separating the rhinestones out from the plastic-suction disk. The invention further discloses a plastic-suction disk. By manufacturing the ground and polished rhinestones into a plastic-suction disk in a plastic-suction forming manner, the rhinestones can be fixed onto the plastic-suction disk, therefore, the plating treatment can be carried out on the entire disk of rhinestones, in this way, the invention can improve the processing efficiency, guarantee the processing quality, reduce the manual operation procedures and reduce the difficulties in plant management.