Abstract: Corn harvesters are key equipment for entire mechanization of corn production．With implementation of agricultural machinery subsidy policies, corn harvesters have achieved rapid development．In order to master quality level of corn harvesters, two quality surveys on some corn harvesters in use in Shanxi Province in recent years were conducted．Comprehensive satisfaction, safety, reliability, applicability, and after-sales service status of corn harvesters satisfaction data were summarized and statistically analyzed, problems existing in corn harvester in use were analyzed, improvement measures and suggestions were proposed．