Belonging to the technical field of purification treatment, the invention relates to a metal adsorbent and a sodium hydrosulfide solution purification method using the same. The metal adsorbent comprises 70-90wt% of a trithiocyanuric acid trisodium salt and the balance xanthate. The sodium hydrosulfide solution purification method using the metal adsorbent comprises the steps of: dissolving sodium hydrosulfide, adding a metal adsorbent to precipitate impurities, conducting double filtration, and carrying out dilution and filling. The metal adsorbent provided by the invention adopts a special formula and obviously reduces iron ions in the sodium hydrosulfide solution, improves the quality of the sodium hydrosulfide solution, shortens the filtration time, and is reproducible, thus being environment-friendly.