Nucleic acid sampling robot and sampling method

The invention discloses a nucleic acid sampling robot and a sampling method.The robot comprises a supporting piece, a parallelogram connecting rod mechanism, a cotton swab clamping mechanism, a linear motion mechanism and a driving connecting rod, and the parallelogram connecting rod mechanism at least comprises a first connecting rod and a second connecting rod which are parallel to each other; wherein the tail part of the first connecting rod serving as the rack is mounted on the supporting piece through a revolute pair; the cotton swab clamping mechanism is mounted at the front end of the second connecting rod; the two linear motion mechanisms are installed on the supporting piece in a V shape. One ends of the two driving connecting rods are respectively connected with the tail part of the second connecting rod through spherical hinges, the other ends of the two driving connecting rods are respectively connected with sliding blocks of the two linear motion mechanisms through spherical hinges, and when the