Abstract: A Dougong-timber frame system is an important lateral force resisting unit in traditional timber structures, but often suffers from inclined damage. Therefore, it is of a great significance to conduct a research on the lateral resistance performance of inclined Dougong-timber frame systems. The hall type bracket timber frame in the Guanyin Pavilion of Dule Temple was taken as the research object, its structural characteristics and lateral resistance mechanism were analyzed, a lateral load displacement analysis model for the hall type bracket timber frame was established, and the model parameters were determined. A lateral load displacement analysis method for Dougong-timber frames considering lateral inclined damage is established, and the correctness of the model is verified through experiments. Parameterized analysis was conducted on the initial inclined damage of a 0.013 rad Dougong-timber frame to explore the influence of vertical load and wood elastic modulus on the lateral resistance performance of the skewed bracket wooden frame. The results showed that: with the increase of the inclined damage angle, the lateral stiffness and bearing capacity of the timber frame in the inclined damage direction decreased, while the yield displacement and peak displacement under reverse force increased significantly, and the failure was delayed; as the vertical load increases, the lateral stiffness and peak load of the timber frame in the reverse direction of inclined damage continue to increase; and as the radial elastic modulus of the wood increases along and across the grain, the lateral stiffness and peak load of the wooden frame continue to increase. With the continuous increase of the transverse elastic modulus of the wood, the positive lateral stiffness of the timber frame increases, while the negative lateral stiffness changes slightly. The research results can provide a theoretical basis for the lateral analysis of damaged timber structures in ancient buildings.