NOVELTY - Complete equipment for vacuum extracting, dehydrating and deodorizing biodiesel comprises first decompression odor removing tank (1), second decompression odor removing tank (2), waste water recycling tank (3) and waste water pump (4), where first decompression odor removing tank comprises hollow sealed first tank body (101). The first tank body has rigid vertical cylinder structure and its outer wall is provided with first gas inlet, first port, first gas outlet, first liquid overflow port and first liquid discharge port. The second decompression odor removing tank includes second tank body.    USE - Used as a complete equipment for vacuum extracting, dehydrating and deodorizing biodiesel.    ADVANTAGE - The device has simple operation method, saves energy and yields good quality product.    DETAILED DESCRIPTION - Complete equipment for vacuum extracting, dehydrating and deodorizing biodiesel comprises a first decompression odor removing tank (1), second decompression odor removing tank (2), waste water recycling tank (3) and a waste water pump (4), where the first decompression odor removing tank comprises a hollow sealed first tank body (101). The first tank body has rigid structure of vertical cylinder and its outer wall is provided with a first gas inlet and outlet, a first port, a first liquid overflow port and a first liquid discharge port. The second decompression odor removing tank comprises a hollow sealed second tank body, where the second tank body has rigid structure of vertical cylinder and its outer wall is provided with a second gas inlet, a second port, a second gas outlet, second liquid overflow port and a second liquid discharge port. The first gas inlet is connected with the gas outlet of the biodiesel preparing reactor through the metal pipe. The metal pipe is inserted into the first tank body below the liquid line through the first gas inlet. The second gas inlet is connected to the first gas outlet through the metal pipe. The metal pipe is inserted into the second tank body below the liquid line through the second gas inlet. The second gas outlet is connected with the vacuum system through the metal pipe. The waste water recycling tank has a sealed horizontal cylindrical structure with the upper end opened to the liquid inlet and the lower end opened to the liquid outlet. The liquid outlet of the waste water pump is connected with the waste water biodiesel preparing and methanol recycling tank through the metal pipe. The first liquid overflow port and the second liquid overflow port are connected with the waste water recycling tank through the metal pipe. The first liquid discharge port and the second liquid discharge port are connected to the liquid inlet of the waste water recycling tank through the metal pipe.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the complete equipment for vacuum extracting, dehydrating and deodorizing biodiesel (Drawing includes non-English language text).    First decompression odor removing tank (1)    Second decompression odor removing tank (2)    Waste water recycling tank (3)    Waste water pump (4)    First tank body (101)