Abstract: Hilly and mountainous areas are weak areas for development of agricultural mechanization in China, research status of agricultural machinery in hilly and mountainous areas from aspects of agricultural machinery design, modular design method and unit operation collaborative control in hilly and mountainous areas were analyzed．Problems that existed in development of agricultural mechanization in hilly and mountains were pointed out, such as insufficient of innovative design method, poor collaborative control effect of unit operation and low degree of intelligence in development of agricultural machinery in hilly and mountainous areas in China．And then, combined with modern design technology, some suggestions were made, such as electrification upgrade of drive mode of agricultural machinery in hilly and mountainous areas, modular design of multi-source drive and efficient transmission power chassis, data-driven modeling and intelligent collaborative control were put forward for development of agricultural machinery in hilly and mountainous areas from perspective of electrification, digitalization and intelligence．