Abstract: Molidawa Daur Nationality Autonomous Banner is the hometown of the soybean. Because soybean area is too large, there are many problems in the soybean fields of chemical weeding. Due to the resistance of farmland weed communities is strengthen, the difficulty of chemical weeding increased by the harm of the weed ,the mistaken choose, duplicate mix and use of the herbicide, serious of soybean field seedling stage phytotoxicity, the aggravated hazards of long residual herbicide, backward in weeding and herbicide spraying machinery and so on, seriously affect the development of the region＇s agricultural structure adjustment and other crops, affecting the yield and quality of soybean. Proposes to speed up industrial restructuring, scientific and rational selection and use of herbicides, scientific and rational adjustment of planting structure and improve the use of herbicides technology, Strengthen long of residual herbicides scientific use and management, strengthen the development of spraying machinery, production, management and applied technology research, pay attention to the safety of the herbicide, and to promote the development of China＇s chemical weed.