Based on the the finite element analysis software ABAQUS, the nonlinear analysis of a reinforced concrete beam was carried out.In this simple beam analysis, the concrete damage plasticity model in ABAQUS has been introduced thoroughly.Finally, the results of the experimentation and the ABAQUS analysis were compared in a diagram, accordingly reasons of the result difference between the two methods were discussed about, which can be a useful reference for the further study of the finite element analysis on ABAQUS.