The diversified supply mechanism of the public service is a strategic support for achieving high-quality development of regional economy. This study insists that, to make up for the shortcomings of public service supply in Beijing-Tianjin-Hebei Region, strengthen public services supply weaknesses, improve the quality of public service supply, satisfy the needs of urban and rural residents in Beijing-Tianjin-Hebei Region for a better life, and deepen the reform of the public service supply-side of the three places, it is particularly necessary to establish a coordinated supply mechanism of multiple public services centered on the coordinated development of Beijing-Tianjin-Hebei Region. Based on the analysis of the Beijing-Tianjin-Hebei Region public services supply, this study proposes that measures, such as deepening system reforms in key areas, optimizing the service demand expression mechanism, strengthening the supply of diversifi ed entities, and optimizing public service evaluation mechanisms, etc., should be adopted to improve the diversifi ed collaborative supply capabilities of the public service in the new era.