Abstract: Intelligent field weeding robots are an important manifestation of the modernization, refinement and intelligence of contemporary agricultural development, and are of great significance to national social development and environmental protection. In order to clarify the current research status of key technologies and equipment of intelligent weeding robots, the research status and operation modes of typical weeding robots were summarized from the aspects of weeding modes, identification and positioning of seedlings and grasses, and intelligent navigation modes. Then the importance and research progress of the key technologies of intelligent navigation, seedling and weed identification and weeding execution system were summarized. Combined with the research characteristics of weeding robot, such as complex and changeable operation environment, delicate operation object, special use object and seasonal operation, the existing problems of current key technologies were pointed out. According to the problems, the future development trends of integrated navigation technology, image processing technology of complex field environment, weed classification, research and development of inter-plant weeding terminal actuator and mechanical structure optimization are explained.