Abstract: On the basis of the analyses of the serious eco environmental problems existing in China, the development of Chinese agricultural engineering technolgies & their effects on eco environmental protection were reviewed in some aspects in the past decades. By strengthening environmental protection awareness and making scientific plans for reasonable development & utilization of natural resources, agricultural engineering technologies should be fully developed & employed to deal with eco environmental problems such as environmental pollution resulted from some agro product proccessing. And agricultural engineering technologies should play an important role in solving the eco environmental problems in China.