Three-blade interface saw for sanitary ware materials. Three tungsten carbide alloy saw blades comprisecomprise combined cutting tool. Tenon port can be milled correctly on sanitary ware or curtain wallthrough once cutting stroke. The milling cutter can be adjusted at up-down direction and anteriorposteriordirection according to the needed size of tenon port. The vertical blade can be half increasedfor use in notch and cutoff. Therefore, the processing scope is wider, the suitability is wide and productivityis high.