Abstract: The lateral inclined angle is a unique construction method for the wooden column in the ancient wooden structure, it is an important factor that cannot be ignored in the analysis of the mechanical performance of the wooden column. Compared with the vertical column, the lateral force of the column with lateral inclined angle is no longer symmetrical about the vertical axis of the column, and the lateral force and the restoring bending moment of the vertical column are not suitable for evaluating the mechanical performance of the column with lateral inclined angle. By analyzing the rocking process of the column with lateral inclined angle, the conditions of deformation coordination and bending moment balance conditions, the critical conditions of the lifting of the column with lateral inclined angle during positive and negative rocking are proposed. And the calculation formula for the residual bending moment of the column foot and lateral resisting force of column in the full compression and bias compression working states are proposed. The lateral inclined angle of the column is determined by the grounds of the 'Ying Zao Fa Shi'. The numerical simulation model of the column with a lateral inclined angle of 0.01 rad is established by ABAQUS. The theoretical results are verified up on the numerical simulation of the column with lateral inclined angle. The results show that the positive (in the inclined direction) lateral resistance of the column with lateral inclined angle is 21% lower than that of the vertical column. The research results have an important theoretical significance and engineering application value for the seismic performance analysis of columns in ancient wooden structures.