The invention discloses a weeding robot special for agriculture. The robot comprises a pesticide tank, a rotating plate, a spraying control valve and a base, the pesticide tank is arranged on the base and connected with a first conveying pipe, the other end of the first conveying pipe is connected with a water tank, and a water inlet is formed in the upper end of the water tank. A hand switch valve is arranged at the end, close to the pesticide tank, of the first conveying pipe, a flow meter is arranged at the end, close to the water tank, of the first conveying pipe, and a pesticide pump is arranged between the flow meter and the hand switch valve. A second conveying pipe is arranged on the lateral side, away from the first conveying pipe, of the water tank, the rotating plate is arranged at the end, away from the pesticide tank, of the base, and a support is arranged on the rotating plate. By means of the weeding robot special for the agriculture, it can be achieved that pesticides and water are mixed quantitatively, the dose amount of the pesticides can be controlled to be sprayed according to the size of weeds, and the waste of the pesticides is avoided.