Based on the relevant data of 31 provinces and cities（including autonomous regions）（Due to the lack of data，the statistical data mentioned here do not include the Hong Kong Special Administrative Region，the Macao Special Administrative Region and Taiwan Province.）in China from 2005 to 2019，an index system was constructed from four aspects，including economic growth，economic structure， public services and ecological environment. The regression control method was used to analyze and evaluate the policy effect of the Beijing‐Tianjin‐Hebei coordinated development strategy and evaluate its role in promoting high‐quality regional development. The results show that the Beijing‐Tianjin‐Hebei coordinated development strategy has significantly improved the quality of regional economic development，promoted the transformation of industrial structure and the upgrade of industrial technology，while improved public services and the quality of the ecological environment. However，it has not promoted an overall increase in the quantity of regional economic development. The reason is that different functional orientations of the strategy for different cities bring heterogeneous impact. The results provide some reference for quantitative analysis and evaluation of the policy effects of the Beijing‐Tianjin‐Hebei coordinated development strategy，and offers a new perspective on the problem of unbalanced regional development.