Archaeological work is an important task in the presentation and construction of the history of the Chinese nation and the treasures of Chinese civilization. Understanding history is inseparable from archaeology. In 2021，Beijing municipal cultural heritage department is based on a new stage of development and implementing a new concept of development，making great efforts in archaeology and protection of great heritage relic，which has made a series of important archaeological discoveries and effectively conserved a number of important cultural relics. It profoundly reveals the glorious social，political，economic，technological，cultural，and artistic achievements of the ancient capital Beijing during the formation of the pluralistic pattern of the Chinese nation. It has effectively achieved protection in development and development in protection，forming a win-win situation between urban development and cultural relics protection.