Liquid suction device

The utility model belongs to the technical field of medical instruments, and discloses a liquid suction device which comprises a box body, a containing bin and a needling assembly, the box body bears a plurality of capsules evenly arranged in the length direction of the box body, the containing bin contains the box body, an opening is formed in one end of the containing bin, and the box body can enter and exit from the containing bin through the opening. Two rows of through holes are formed in the side wall of one side of the containing bin, potential safety hazards are reduced, when the box body is located in the containing bin, the two rows of through holes are aligned with the upper ends and the lower ends of the multiple capsules one by one, the needling assembly comprises a first needling needle and a second needling needle, the first needling needle and the second needling needle are vertically arranged, and the first needling needle conveys air into the capsules. The second pricking needle sucks hydrog