Abstract: With development of soybean industry, harvester begins to be widely used．Three kinds of soybean harvesters commonly used in Shangqiu City were selected for production test．Results showed that performance of this type of machine was improved, but crushing rate and loss rate still exceed standard．Reason for problem was analyzed and some suggestions were put forward to optimize operation effect, such as strengthening manipulator training, selecting appropriate varieties, harvesting in the right time, adjusting header and thresh device．