Abstract: In view of existing problems of agricultural development system in hilly and mountainous areas such as imperfect system，poor interoperability among planting industry，breeding industry and agricultural mechanization，low level of integration，and low value-added agricultural products，application of circular agriculture mechanization mode in hilly and mountainous areas of Chongqing was studied.Through analysis of two typical application modes of circular agricultural mechanization in hilly and mountainous areas of Chongqing，support and security function of mechanization in development of circular agriculture industry in hilly and mountainous area of Chongqing were studied，and it′s mechanization mode was summarized，which could provide technical and theoretical support for circular agricultural mechanization in hilly and mountainous areas.