The invention discloses a grease tubular type continuous saponification device. A heating tank is provided with a heat carrier inlet and a heat carrier outlet; a heating coil is arranged in the tank, the inlet and outlet of the heating coil are respectively arranged on both ends of the heating tank; a grease saponification mixture enters the heating coil from the inlet; the spread length of the heating coil is 600-800 m, and the inner diameter of the heating coil is 20 mm; the outlet of the heating coil is connected to a conveying pipe; one end of the conveying pipe through a gear pump is connected with the outlet at the bottom of a stirring tank, and the other end of the conveying pipe is connected with the inlet of an air-cooled cooler uniformly distributed with air-cooled pipes; the outlet of the air cooler is connected with the inlet on the top of the mixing tank, and the lower part of the mixing tank is provided with a grease finished product outlet. The invention has reasonable structure, and safe and reliable performance; high temperature and high pressure airtight transportation is employed in the reaction process, so that chemicals and water do not leak; and the invention also has the advantages of raw material conservation, environment protection, long reaction path, full reaction, no additional material in the reaction process, and stable product quality.