NOVELTY - Device comprises catalytic reaction layer (1), stratosphere temperature layer (2), standing layering vessel (3), polar product storage tank (4), crude oil product storage tank (5) and reaction tower. The reaction tower has a tube structure. The upper layer of reaction tower is a catalytic reaction layer. The lower part of methanol raising layer is provided with standing layering vessel. The middle part of reaction tower is provided with gas phase methanol entrance. The top part of reaction tower is provided with methanol reflux device.    USE - Device used for producing biodiesel oil (claimed).    ADVANTAGE - The device enables to producr biodiesel oil with high product purity and improves the reaction conversion rate 10-25%.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing biodiesel oil, which involves:    (A) entering raw material into reaction tower and then entering ethanol from middle part of into reaction tower;    (B) entering gas phase methanol into reaction tower as catalyst;    (C) entering the gas phase methanol reaction product into methanol storage tank;    (D) entering methanol reaction product into gasification bed layer and then entering the other products into standing layering vessel;    (E) entering the crude oil upper layer into product storage tank;    (F) passing the crude product through first-stage rectifying tower and then separating the methanol by methanol separater;    (G) entering the secondary distilled crude product through second level rectifying tower;    (H) distilling light components of biological diesel oil of low boiling ;    (I) distilling high boiling point through three level rectifying tower of the biological diesel oil;    (J) entering the product from the methanol flash distilling tower and entering into methanol separator; and    (K) removing distilled water and a byproduct glycerine from the tower top.    DESCRIPTION OF DRAWING(S) - The drawing shows a sychematic view of a device.    Catalytic reaction layer (1)    Stratosphere temperature layer (2)    Standing layering vessel (3)    Polar product storage tank (4)    Crude oil product storage tank (5)