The invention discloses an antibacterial bathroom ceramic article and a preparation method thereof. The antibacterial bathroom ceramic article comprises a billet and glaze, wherein the billet is prepared from talcum, kaolin, anorthite, bauxite, muscovite, ilmenite, wollastonite, chlorite and silicon nitride; and the glaze is prepared from talcum, anorthite, borax, zirconium silicate, titanium dioxide, zinc oxide and nano silver. The preparation method comprises the following steps: pulverizing the raw materials of the billet, and screening to obtain the billet raw material; carrying out wet-process ball milling on the billet raw material, aging by standing, carrying out injection molding, demolding, drying, and carrying out bisque firing to obtain the billet; mixing and pulverizing the talcum, anorthite and borax, adding the nano silver and dilute nitric acid, drying, and adding the zirconium silicate, titanium dioxide and zinc oxide to obtain a glaze material; carrying out wet-process ball milling on the glaze material, aging by standing, spraying on the billet surface to obtain an article to be fired; and carrying out glaze firing on the article to be fired, thereby obtaining the antibacterial bathroom ceramic article. The antibacterial bathroom ceramic article has the advantages of favorable weather resistance, favorable antibacterial property and low water absorptivity.