The invention discloses a weeding device for landscaping. The weeding device comprises a base, a herbicide box, a damping device, a front cutting wheel, a storage battery, a nozzle, a cutting device I, a protective cover and a cutting device II, wherein the herbicide box, the storage battery and a support platform are respectively arranged on the upper surface of the base, a second driving motor is fixedly installed on the upper surface of the support platform, an output shaft of the second driving motor is linked with a rotating shaft II through a coupling, a main driving gear is arranged on the other end of the rotating shaft II, secondary driving gears are respectively arranged on both sides of the main driving gear, the cutting device I and the cutting device II are respectively arranged below the protective cover, a push rod is fixedly connected to the upper surface of the right end of the base through threaded connection, and the damping device is fixedly embedded into the left end of the base. The weeding device has the advantages of simple structure, good damping effect, stability in operation and good weeding effect and has a high practical value, and additionally, herbicides can be sprayed.