According to brush features and height advantage of stellera chamaejasme during its early budding stage, a kind of targeted spraying device for its removed was proposed. The design of the frame system, spraying system, electrical control system and machine structure of the device were completed. By means of radar range sensor technology, the stellera chamaejasme could be automatically identified and site specific accurately sprayed. The results of real test showed that this device could effectively eliminate stellera chamaejasme with 87.1% pesticide adherent rate. This device could improve the efficiency of stellera chamaejasme removed and reduce the amount of pesticide used, which was benefit for reducing the environmental pollution caused by high amount of continuous spraying.