As an international major forestry pest,Dendroctonus valens immediately became the lethality of Pinus tabulaeformis pests and quickly spread in China since its introduction to China. This study applied Chinese historical climate data (1981 - 2010) and the simulated future climate data (2011 - 2040),treated the biological information of the pest as the theoretical basis,used CLIMEX software to analyze,predict,compare the climatic potential distribution for D. valens under historical and future climate in China. The results showed that the potential distribution of the pest under two climate conditions are concentrated in the South and Huabei China region,and the area of the highly favourable habitat is largest. While under the future climate condition,because of the climate will change in every regions,the range of the potential distribution will expand to the Northeast and Northwest of China. These results help to clarify that climate change will have a certain effect on the potential distribution for the pest,which results in the expansion of potential distribution area and movement of the boundary towards north; meanwhile,suitable degree of survive in most areas raises accordingly. This study could provide a reference and guide to facilitate its control in China.