This report analyses the elements of economic development, national governance, resource utilization, environmental protection, social development, business environment, structural transformation and national scale development in 65 countries along Belt and Road, including China. By selecting 23 specific indicators and building an evaluation model with a two-tier structure. The single development level and the overall level of development (comprehensive development level) of different countries including the above chosen elements are calculated respectively. Based on the results of the calculation, the 65 countries are itemized and ranked as a whole. Further, the analysis and evaluations based on the ranking are carried out. The total population of 65 countries covered by the study is 4.6 billion,which represents 62 percent of the world's total; 50 million square kilometers of land area is sampled, accounting for 39 percent of the world's total; referenced GDP is $23 trillion, and accounts for 31 percent of the world's total. Therefore, the results of this study are of great significance not only for a better understanding for the current development situation, existing problems and future development prospects in countries along Belt and Road, but also of some significance for understanding the development trends, problems and prospects in the contemporary global. In addition, the study provides reference value in aspects of better policy communication, coordination and strategic alignment with countries along the Belt and Road route, better choice of investment countries and investment directions for enterprises, as well as deepen the Belt and Road researching.