Starting from the connotation of high-quality financial development，this report constructs an evaluation index system for high-quality financial development from the perspectives of financial ecology and financial services to the real economy. This report uses the entropy weight method，the kernel density method，the convergence mechanism test model and the obstacle factor diagnosis model to explore the level and space-time differences of high-quality financial development in the Beijing-Tianjin-Hebei region，and analyzes its restrictive factors. The results of this report found the following two points. First，from 2011 to 2020，there is no σ convergence in the high-quality development of finance in the Beijing-Tianjin-Hebei region，but absolute β convergence. Condition β convergence is achieved when conditions such as industrial structure，social welfare and human capital are different. Second，through the obstacle factor diagnosis model，it is found that financial efficiency and financial structure are the main factors restricting the high-quality development of Beijing-Tianjin-Hebei finance. Based on the research results，this report puts forward the following recommendations：give full play to their respective advantages to achieve dislocation development；make up for regional shortcomings and improve the quality of development；strengthen regional cooperation and coordinate development.