The legend of the Yang Family Generals shows the collective image of a heroic family. At the moment of foreign invasion and national crisis, the Yang Family Generals stood up to the powerful enemy and fought bloody battles. Their strong, strong and heroic spirit of sacrifice demonstrated the indomitable national spirit of the Chinese people. As a part of the legend of the Yang Family Generals, the legend of Mu Guiying shows the joys and sorrows and loves and hates of a woman who has been on the battlefield for a long time, and conveys the deep love of the broad masses of people for the beautiful and brave heroine Mu Guiying. The legend of the Yang Family Generals (Mu Guiying) has important historical and cultural value, and is also very rich in ideological and educational significance. The legend of Mu Guiying in the Yanshan area of Fangshan District, Beijing, is based on the theme of mother-child affection, with vivid and prominent characters and concise, vivid and simple language. Among them, the legends with the theme of maternal love, such as "Naizi Stone", "Yanger Valley" and "Wangertai", are particularly precious, reflecting the true face of social life in the Liao and Song dynasties. They have a wide range of mass and folk inheritance, and are a prominent form of expression of local traditional folk culture. They have high academic research value in sociology and ethnology. With the acceleration of the modernization process, people's ideas and concepts are undergoing drastic changes, the number of inheritors is decreasing, and the cultural space for the spread of the legend is shrinking. The inheritance of the Mu Guiying legend is not optimistic, and protection must be strengthened in a timely manner.