Extraction tank

The utility model discloses an extraction tank which comprises an extraction tank body, a stirring tank is arranged in the extraction tank body, a stirring assembly is arranged in the stirring tank, the stirring assembly comprises a servo motor installed on the top of the stirring tank, a reciprocating screw rod is arranged on a rotating shaft of the servo motor, and the reciprocating screw rod is connected with the stirring tank. The reciprocating screw rod is in threaded connection with a driving block, the driving block is rotationally connected with a stirring rod, the stirring rod is provided with a plurality of groups of stirring blades, and a driving unit for driving the stirring rod to rotate is also arranged between the stirring rod and the stirring tank. A servo motor drives a driving block to slide up and down in a reciprocating mode through a reciprocating lead screw, then a stirring rod slides up and down in a reciprocating mode, meanwhile, a driving unit drives the stirring rod to rotate while t