Abstract:The plastic bearing capacity of beam and its corresponding plastic deformation ability are co-existed. It is easy to calculate the bearing capacity of continuous beam, Such as static method or mechanism, But it is difficult to calculate the plastic deformation of continuous beam, Because plastic deformation is related to loading history, it means the rigidity change process should be taken into account, Usually use numerical calculation to calculate it, In this paper, the finite element software ANSYS is adopted to calculate the plastic bearing capacity and corresponding plastic deformation of continuous beam. The effect of parameters should be considered, Such as load conditions and span ration, These effects cannot be ignored in calculating the plastic bearing capacity.