Abstract: Disclosed herewith is a distillation apparatus for water purifiers. The distillation apparatus includes a purifier body, a boiler, a condensing coil and a water storage tank that are sequentially connected to each other. The front portion of the condensing coil is extended through a preheating tube comprised of a heat chamber, an inlet and an outlet. The inlet of the preheating tube and the purifier body is connected by a first purified water supply line. The outlet of the preheating tube and the boiler is connected by a second purified water supply line.