The varied-axial force beam-column is widely used in practice. Unlike the academic method

the numerical method is usually used only to solve its stability problem

but not to give the general answer a series of problems for beam-column. In this paper

firstly

a new conception of dimensionless beam column is presented. Secondly

based on the column deflection curve (CDC) method

the calculation formula for critical load of variable-axial force beam-column is derived. Thirdly

the numerical results under axial symmetric load are derived. Finally

the interaction formula on the critical load of beam-column under concentrated axial load

even distributed axial load and triangular distributed axial load and under these loads acted simultaneously are proposed respectively. The method given in this paper expands the application of CDC.