Cities are highly concentrated areas of economic activity and economic activity. They are also an important source of energy consumption and greenhouse gas emissions，and are vulnerable to the adverse effects of climate change and climate disasters. With the development of economy and society and the gradual emergence of climate change，addressing climate change has become one of the important challenges facing urban development in the future. As the capital and political，economic and cultural center of China，Beijing faces a severe climate security situation. Especially the extreme climate events have caused huge economic and social losses and casualties. It is urgent to fill the shortcomings of urban adaptation to climate change. Effective and effective measures to improve urban adaptability. Based on the main ideas of the PSR model，this paper initially constructs a climate safety assessment index system including three primary indicators including climate security pressure，climate risk status and climate safety response，and 24 secondary indicators，for Beijing 2003-2017. The climate safety comprehensive index，climate safety stress index，climate risk status index and climate safety response index have been calculated and evaluated，and combined with the evaluation results，the policy of how to optimize the evaluation index system，strengthen the use of evaluation results and improve the climate safety level Targeted recommendations were made on measures.