The present invention relates to a method for manufacturing a silver iodide-coated ball having a sterilizing function and a silver iodide-coated ball manufactured thereby and, more specifically, to a method for manufacturing a silver iodide-coated ball having a sterilizing function and a silver iodide-coated ball manufactured thereby, wherein a ceramic ball is coated with silver iodide capable of effectively removing microorganisms or bacteria that survive and reproduce in drinking water and industrial water.