The utility model discloses an electronic adjustable device of weeding of small -size single hand -held, including the frame and a supporting beam and a wheel that supports whole device, rack -mounted tine, rack -mounted harrow grass device to and rack -mounted storage battery unit and motor. Wherein, tine is circular -arcly with the handle of a knife and is the revolute pair between the two and is equipped with the spring adjusting the tine height from top to bottom, storage battery unit is connected through built -in controller and electric wire and motor and just is equipped with shift knob, harrow grass device and tine handle of a knife are made by material made of iron. The beneficial effects of the utility model are that: at the in -process of actually weeding, only need operating personnel through hand control direction, thus the switch through the pushbutton control motor and the depth that control was weedd or was loosened the soil that reciprocates through adjustment handle control tine, the effect of leveling land taken away but also played to harrow grass device not only can to weeds. This device easy operation is convenient, and the practicality is stronger, can alleviate peasant's intensity of labour greatly, improves field work efficiency, and is not only laborsaving but also save time.