In order to optimize the allocation of heat and light in Dongting Lake area, and improve the level of light and simplified production, we discuss the limiting factors and deficiencies of main planting patterns inthis area, and analyze the advantages of cropping pattern of rapeseed-rice rotation in the area from fouraspects: heat-light resource, combination of utilization and nurturing, product quality and planting benefits.Then, we point out the problems and prospects of the rapeseed-rice cropping system, a...