The utility model relates to a liquid chromatography moving phase stock solution taking device, belonging to the field of laboratory instruments. The liquid chromatography moving phase stock solution taking device comprises a liquid storage bottle which is connected with a liquid bag by use of a liquid inlet pipe; the liquid storage bottle is arranged in an ultrasonic tank; the liquid bag is suspended on a supporting rod in an inverted manner; the supporting rod is vertically inserted into an iron table; a liquid outlet pipe is inserted into an outlet of the liquid bag; the other end of the liquid outlet pipe extends into an inlet of a moving phase standby bottle on a liquid chromatograph; the liquid outlet pipe is connected with a branch pipe, and the other end of the branch pipe is connected with a vacuum pump; a spherical device is arranged on the branch pipe. The liquid chromatography moving phase stock solution taking device has the advantages of simple structure, convenience in taking of a moving phase, and the like.