Quantitative liquid taking device

The utility model provides a quantitative liquid taking device, and belongs to the technical field of medical treatment. The device mainly comprises a box body, a groove is formed in the box body, a lifting machine is installed in the groove, a storage block is detachably installed at the upper end of a lifting rod of the lifting machine, a storage groove is formed in the upper end face of the storage block, a fixing hole is formed in the top of the box body, a connecting piece is installed in the fixing hole, and a liquid suction head is detachably installed at the lower end of the connecting piece. A suction pump is installed at the top of the box body, the upper end of the connecting piece is communicated with a liquid inlet pipe of the suction pump, a waste liquid groove is formed in the back face of the box body, a waste liquid hole is formed in the top of the box body, a waste liquid box is movably placed in the waste liquid groove, and the liquid outlet pipe is communicated with the waste liquid box in