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  **Author contributions**
  K.L. designed the framework of the article and analyzed the yield results and the maize price under future sce- 
  narios. J.P. simulated the climate data from 5 climate models recommended by ISI-MIP under 4 RCP scenarios. 
  W.X. simulated the maize yields in whole world under different scenarios. W.X. simulated the market price of 
  maize at national and global levels. T.A. helped the revision of language. 