Abstract: At present, there are some problems in mechanized harvesting of leaf vegetables, such as single harvesting object, low harvesting efficiency, disorderly spreading and high damage rate, Combining different leaf vegetables physical characteristics and different leaf vegetables harvesting methods, Designed a leaf vegetable harvesting device, which adopts Modular design, adjustable wheel pitch, adjustable cutter height, by changing or adjusting different devices to achieve the above-ground leafy vegetables for loose-leaf harvesting, shallow soil-cut leafy vegetables harvesting, shallow soil-block root vegetables harvesting; The structural form of the unit module combination, the structural parameters of the sliding cutting knife for the loose-leaf harvesting of leafy vegetables, the structural parameters of the flexible potting roller and the selection of the material are emphatically designed, the leaf vegetable harvesting device can be multi-purpose and multi-function, which meets the design requirements of low input, low damage, high quality and high benefit for vegetable growers.