As a major sport event attracting global attention, the Olympic Games reflect the overall national strength, and highlight the international influence and competitiveness of the host country. As the competitive events have a requirement for the environment of the host country, which is a good opportunity to improve the ecological civilization of the host country. Beijing 2008 Olympic Games has played an important role in improving the ecological environment of Beijing. With the approaching of the Winter Olympics in 2022, we have ushered in new opportunities to promote the construction of Beijing's ecological civilization. Taking Beijing's ecological civilization as the research subject, we construct the evaluation index system of the index of ecological civilization, and use the coefficient of variation method to determine the weight of the index. It evaluates Beijing's ecological civilization from five aspects: growth quality, environmental protection, environmental quality, resource utilization and environmental governance. It is concluded that the index of Beijing's ecological civilization is on the rise as a whole. It has a significant impact on the construction of ecological civilization, and the measures taken by the government are ready for the successful hosting of the 2022 Winter Olympic Games.