Abstract: In order to adapt to the task demand of the rural revitalization strategy and promote the science and technology innovation of agricultural engineering, we explicate basic connotation of rural revitalization strategy and summarize the important roles of science and technology innovation of agricultural engineering in promoting the agricultural and rural economy development in recent years. The main roles include: 1) Agricultural mechanization projects improve production efficiency; 2) Agricultural water-soil engineering ensures stable yields despite of drought and waterlogging conditions and improves ecological environment; 3) Land use project increases and optimizes cultivated land resource and raise productivity; 4) Agricultural products storage and processing engineerings promote the integrated development of primary, secondary and tertiary industries; 5) Rural energy projects promote green development; 6) Agricultural resource recycling project promotes sustainable development of agriculture; 7) Agricultural construction and biological environmental engineering improves labor productivity and resource utilization; 8) Agricultural and rural informatization project promotes the development of precision agriculture and smart agriculture; and 9) Agricultural and rural planning and design makes scientific plans for the development of agriculture, rural areas and farmers. We mainly analyze the new subject of agricultural engineering science and technology innovation from the three aspects of industry revitalization, ecological revitalization and talent revitalization, and put forward the main task of agricultural engineering science and technology innovation and talent cultivation in the new period. The main tasks are: 1) building up systematic thinking, strengthening the role of overall planning and integration, integrating agricultural engineering theories, methods, technologies and equipments, and providing overall, comprehensive and effective solutions; 2) focusing on improving quality and efficiency, promoting agricultural transformation and upgrading, and launching a number of key engineering technologies and equipment; 3) strengthening the concept of circular development, promoting the integration of production, living and ecology, optimizing the spatial structure of agriculture and rural areas and industrial layout, and providing industrial development and engineering solutions for planting and breeding cycles, reduction of inputs, clean production, recycling of wastes, and ecological patterns; 4) improving the application and innovation levels of informatization, promoting the development of digital agriculture and rural informatization, establishing a batch of products with intelligent perception, intelligent control and intelligent service; 5) highlighting the urban-rural integration, integration of primary, secondary and tertiary industries, functions integration, industries and rural areas integration, agriculture and internet integration, elements integration and collaboration integration, and working out good plans for implementing rural revitalization strategy; and 6) strengthening the academic discipline construction and reform, establishing majors in urgent need and cultivating agricultural engineering and technical personnel who are urgently needed for the modernization of agriculture and rural areas, so as to provide strong support and efficient services for the implementation of the strategy for rural revitalization.