Weeding robot for pesticide spraying

The invention discloses a weeding robot for pesticide spraying. The weeding robot comprises a balancing device, a supporting arm, a walking device and a pesticide spraying weeding device; a left balance arm and a right balance arm are arranged on the two sides of a fixing frame; the left balance arm is connected with a balance gear through a left transmission shaft; the right balance arm is connected with a balance gear through a right transmission shaft; and two middle transmission gears are connected between the two balance gears in a meshed mode, so that the left balance arm can drive the right balance arm to rotate in an aligned mode when stressed to form balance, and the balance effect of the robot is improved. By arranging a steering motor on a power gearbox, the steering motor drives a steering gear to rotate through a first motor output shaft, a driving gear and a connecting gear, so that the steering gear rotates to a certain angle, the steering gear drives moving wheels to rotate through a connectin