The essence of ecological security focuses on ecological risk and ecological vulnerability,and the study of ecological security is the hot points of low-carbon green development,which has important theoretical value and practical significance for optimizing landscape ecological spatial structure and maintaining ecological sustainability.Based on the interdisciplinary principles and methods involved in geography,ecology,remote sensing and GIS,this paper studies the characteristics and laws of climate change and landscape pattern,the coupling relationship between climate change and ecological process,landscape pattern and functional properties.The relationship between landscape pattern,climate factors and soil,hydrological processes and vegetation processes in the ecosystem is analyzed,and the effects of climate change on carbon storage,NPP and ecosystem services are studied to reveal the impact of climate change on ecological processes.The comprehensive analysis shows that climate factors affect the characteristics and changes of ecological security.Meanwhile,landscape pattern is the basis of restricting regional ecological security,and the effects of climate change and landscape pattern on ecological security mechanism are complex.