In order to facilitate the independent operation of the wheeled plant protection robot, a wire-controlled chassis with wire control, modularization and generalization was designed and manufactured. The steering drive mode of the plant protection robot adopts front wheel drive rear wheel steering. The steer-by-wire system uses a steering motor to drive the steering gear and installs a corner sensor on the steering column to achieve closed-loop control of the steering. The throttle-by-wire system uses a PWM speed control method and uses a Hall sensor to achieve closed-loop speed control. The brake-by-wire system uses a dedicated drive to control the electric linear actuator for braking and closed loop control of the brake through the current loop. For the communication method, the CAN network is used to build the communication of each module. The results show that the line-controlled site can accurately follow the expected action value given by the decision-making system to ensure the accuracy and stability of the plant protection robot operation.