Abstract:The ancient wooden frame form of Xiangxi Ancestral Hall Opera House is regular and flexible. The envelope structure and the load-bearing structure are independent and dependent on each other, which brings great plasticity to the treatment of the building shape. This flexibility, not only can minimize the occupation of internal space, but also can be adapted to beautify the appearance of the building, so that the building natural and beautiful. There are 11 groups of ancestral halls in Dongkou ancestral hall of western Hunan, which is a southern traditional building in Ming and Qing dynasties. This paper sums up the combination form of the main wooden structure, the relation between the roof form and the position of the wooden structure, the feature of the closure of the wing angle, the function of the bottom load-bearing structure, the artistic features of the Cornice pick-out and decoration.