From the constitution elements of the architectural decoration in the fiaxis area of Zhangjiakou, the characteristics of decorative patterns, content moral and artistic ideas of the traditional folk house were researched.The results show that the architectural decoration of the traditional folk house has its unique ar- tistic presentation which can be found in the roof, the wall, the windows, the screen wall and the portal tower, and its sculpting form reflect the manipulation of balance，contrast and rhythm; the architectural decorations are conveniently made by use of local materials which shows the local cultural cormotation of so- cial hamrony between nature and people and reflects the local people-oriented architectural culture.