The invention discloses an urban road green-belt weeding device, which comprises a placing board, the bottom of the placing board is provided with a plurality of first supporting legs, and the bottomsof the plurality of first supporting legs are provided with universal wheels, the side wall of the placing board is provided with a communicating groove, the placing board is symmetrically provided with two limiting devices, a box body is disposed between the two limiting devices, the bottom side wall of the box body abuts against the side wall of the upper end of the placing board, the inner side of the box body is provided with a hollow cavity, the upper end of the box body is provided with a thorough opening communicating with the hollow cavity, and a lifting device is arranged in the hollow cavity. The weeding device of the invention is reasonable in structure design, can realize automatic cutting of weeds, improve the removal efficiency, can directly recover the removed weeds, reduces the workload of workers, can automatically select a herbicide spraying mode according to the actual demand for realizing weeding, and is convenient for sanitation workers to choose a weeding methodaccording to actual needs.