"The Belt and Road Initiative" is of great significance of expanding and deepening China's opening to the outside world, promoting the sustained and rapid economic development of the countries along the Belt and Road and achieving win-win cooperation in the new norm of China's economy. This paper selects 4 first-level indicators and 22 second-level indicators that reflect the level of investment facilitation, systematically constructs the measuring system of investment facilitation, and uses the principal component analysis method to measure the level of investment facilitation in China and surrounding countries. The results show that the level of investment facilitation in China, is highest compared with neighboring countries, followed by India, and Kyrgyzstan is the lowest. In the investment facilitation index system, the level index of the specific second-level indicators varies little and is generally low, so there is much room for improvement in the overall investment environment. China and its neighboring countries should work together to promote investment facilitation through such measures as strengthening infrastructure construction, enhancing policy communication, improving the efficiency of financial services and creating a favorable business investment environment.