Tibetan masonry is widely used in Tibetan building walls. Various forms of deterioration such as cracks, tilt and material damage have appeared under the influence of natural disasters, man-made damage and other environmental impacts. A reasonable assessment of the health of deteriorated Tibetan walls has always been a difficult point in the protection of ancient Tibetan masonry structures. This paper conducts a comprehensive study on several main damage forms that affect Tibetan masonry walls relied on the fuzzy evaluation method and the analytic hierarchy process. The weight coefficients of various influencing factors such as cracks, tilt and material damage are obtained through the parameter iterative process and verified by two brick masonry test models. A quantitative evaluation standard for the performance of the masonry structure wall is given. It also gives the weight coefficient that objectively determine using fuzzy evaluation method. The research results can be used for the rapid comprehensive evaluation of the damage state of the dual-purpose Tibetan masonry structure, and provide a reference for the daily inspection and safety limit assessment of Tibetan building walls.