Baoqing County was originally located in the third accumulated temperature zone of Heilongjiang Province, where rice varieties planted in the third accumulated temperature zone. With the climate warming, the accumulated temperature of activities in Baoqing County has increased. Adjusting the appropriate rice planting structure to make more rational use of heat resources is an important measure to ensure high and stable yield and high-quality rice production. In this paper the effective accumulated temperature, precipitation and sunshine hours in Baoqing County in recent 40 years were analyzed, and the varieties applied in the second accumulated temperature zone were tested and planted. The results showed that Baoqing County could apply 12 leaf rice varieties in the second accumulated temperature zone, which is beneficial to optimize the rice planting structure, and promote the development of high yield and quality of local rice.