The invention discloses a silver plating solution brightener. The silver plating solution brightener is composed of the following raw materials: 5-8 parts of ethylene glycol butyl ether, 6-9 parts ofmagnesium stearate, 3-5 parts of disodium phosphate dodecahydrate, 5-7 parts of quartz powder, 4-6 parts of sodium lauryl ether sulfate, 3-5 parts of trisodium phosphate, 5-8 parts of isomeric alcoholethoxylates, 5-9 parts of hydroxyethylcellulose, 6-8 parts of naphtha, 5-7 parts of methylparaben, 6-8 parts of ethyl maltol, 3-5 parts of otcamethylcyclotetrasiloxane, 5-7 parts of phosphorus pentoxide, and 5-8 parts of ethylenediaminetetraacetic acid. The silver plating solution brightener has the advantages of bright coating mirror surface, high plating solution stability, hard coating, good anti-discoloration ability of the coating, ideal brightness effect and the like.