A cutting device, comprising a first blade (2) and a blade support mechanism moving in a circular motion with respect to the first blade (2), a second blade (4) being mounted on the blade support mechanism a cutting groove (5) is provided on the first blade (2), and a cutting surface (6) is provided on the second blade (4) and/or the cutting groove (5) the cutting device has a simple structure, and is labor-saving and simple to operate while reducing energy consumption, and the driving force thereof is greatly reduced with the same cutting area the cutting device has high cutting efficiency and a smooth cutting cross section, thus the operator is less likely to get injured when cutting plants, facilitating collection of a cut object after cutting.
