Qin Dahe, director of China Meteorological Bureau, said that climate change will face three outstanding problems in future agricultural production. First of all, the instability of agricultural production will increase and the fluctuation of output will increase. The results showed that after climate warming, the yield of irrigated and rain-fed spring wheat would be reduced by 65438 07.7% and 365438 0.4% respectively. Early rice, late rice and single-season rice all showed different degrees of yield reduction; The total output of corn will be reduced by 3%-6% on average. Secondly, the layout and structure of agricultural production will change. The research on the impact of climate change on agriculture in China shows that the northern boundary of safe planting of winter wheat will move from the present Great Wall to Shenyang-Zhangjiakou-Baotou-Urumqi. It is estimated that by 2050, climate warming will move the northern boundary of triple cropping system 500 kilometers north; The double cropping system will be moved to the middle of the current single cropping system, and the area of the single cropping system will be reduced by 23. 1%. The distribution of main crop varieties in China will also change. At present, winter wheat varieties with strong winterness popularized in North China will be replaced by winter wheat varieties with strong semi-winterness. High temperature resistant rice varieties will be dominant in the south; Early-maturing maize varieties in Northeast China were gradually replaced by middle-late maturing maize varieties. Third, agricultural production conditions have changed, and agricultural costs and investments have increased substantially. After climate warming, the microbial decomposition of soil organic matter will accelerate, leading to the decline of soil fertility. After the climate warms, the application amount of pesticides will increase. With the warming of climate and the extension of crop growth period, the number of insect generations will increase in spring, summer and autumn. High temperature also provides superior conditions for the growth of various weeds. Therefore, climate warming may aggravate the epidemic of pests and diseases and the spread of weeds. The range of pests and diseases may also extend to high latitudes.