Abstract: The identification and reinforcement design of the ancient architecture is vitally important to the protection of ancient buildings． The Feiyun Pavilion in Wanrong County，Shanxi Province which has the reputation of“the best wooden pavilion in the world”，is one of the key national-protected cultural sites，The Feiyun Pavilion has serious potential safety hazard due to lack of repairs for many years． Through on-site test of Feiyun Pavilion，given the data of structure deformation were given，then the key repair parts were pointed out after data processing． It was presented the present damage condition of ancient wooden pavilion constructional component，then evaluation of the damaged elements of wood pavilion by was done categorizing them in layers． The past repair treatments and problems of Feiyun Pavilion were summarized． In the end，it was proposed the scope of repairation and structural treatment measures．