text: **Climate change is becoming more and more remarkable which has an obvious impact on crop yields**
  **all over the world. Future climate scenario data was simulated by 5 climate models recommended**
  **by ISI-MIP under 4 RCP scenarios, in which the approximate scenarios with global warming by 1.5 °C**
  **and 2 °C were selected. Applying DSSAT and GTAP models, the per unit yield changes of maize in the**
  **world under global warming by 1.5 °C and 2.0 °C were analyzed and the market prices of maize at**
  **national and global levels were simulated. The results showed that, the risk of maize yield reduction**
  **under 2.0 °C scenario was much more serious than 1.5 °C scenario; the ratios of yield changes were**
  **separately 0.18% and − 10.8% under 1.5 °C and 2.0 °C scenarios. The reduction trend of total maize**
  **production is obvious in the top five countries and the main producing regions of the world, especially**
  **under the 2.0 °C scenario. The market price of maize would increase by around 0.7% and 3.4% under**
  **1.5 °C and 2.0 °C scenarios. With the quickly increasing population in the world, it is urgent for all**
  **countries to pay enough attention to the risk of maize yield and take actions of mitigation and**
  **adaptation to climate change.**