NOVELTY - A device comprises a raw material storage tank (14), an esterification reaction kettle (5), a molecule distillation tower (11), and a methanol rectifying tower (17). The esterification reaction kettle comprises a multi-level reaction kettle connected with a vacuum flask evaporator (2) by a pressure gauge automatic control system (4), a discharge port on a lower part of the reaction kettle connected with a temporary storage tank by a content gauge automatic control system (12), and a compression-type atomizing feeder (13) and a mat-type screen.    USE - A device for continuously preparing biodiesel (claimed).    ADVANTAGE - The device can continuously atomize the material and continuously extract the product, thus obtaining a biodiesel by esterification reaction with a few amount of catalyst under the conditions of medium temperature and medium pressure. It achieves short reaction time, high product quality, low investment, low corrosion degree, and long service life.    DETAILED DESCRIPTION - A device comprises a raw material storage tank (14), an esterification reaction kettle (5), a molecule distillation tower (11), and a methanol rectifying tower (17). The esterification reaction kettle comprises a multi-level reaction kettle connected with a vacuum flask evaporator (2) by a pressure gauge automatic control system (4), a discharge port on a lower part of the reaction kettle connected with a temporary storage tank by a content gauge automatic control system (12), and a compression-type atomizing feeder (13) and a mat-type screen separately arranged in the reaction kettle. The temporary storage tank is sequentially connected with a pre-degassing and a drying tower (10) and the molecule distillation tower. The vacuum flash evaporator is connected with the methanol rectifying tower separately connected with the feed port of the reaction kettle by a methanol steam generator via a pipeline.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view of the device.    Vacuum flask evaporator (2)    Pressure gauge automatic control system (4)    Esterification reaction kettle (5)    Drying tower (10)    Molecule distillation tower (11)    Content gauge automatic control system (12)    Compression-type atomizing feeder (13)    Raw material storage tank (14)    Methanol rectifying tower (17)