Pipetting device applied to full-automatic spotting instrument

The invention discloses a pipetting device applied to a full-automatic spotting instrument, and belongs to the field of medical instruments, the pipetting device comprises a bottom plate, a lifting driving structure mounted on the bottom plate and a spotting structure, the spotting structure is mounted on the lifting driving structure, the lifting driving structure drives the spotting structure to move relative to the bottom plate, and the spotting structure comprises a mounting seat, a spotting needle and an elastic piece; the mounting seat is mounted on the lifting driving structure, the sample application needle is slidably mounted on the mounting seat, the elastic part sleeves the sample application needle, two ends of the elastic part respectively abut against the sample application needle and the mounting seat, and when the sample application needle is used for sample application, due to the existence of the elastic part, a sample application part of the sample application needle is in elastic contact w