The undulation of bundles in woven composites was introduced into the progressive damage model (PD model), and the updated PD model was verified by the results of the test and other methods. Meanwhile, the plain woven composite materials’ elastic properties affected by the geometrical and material parameters were analyzed by this updated PD model. The parameters such as bundle width, bundle thickness, gap, braid angel, undulation angel and overall volume fraction of woven composite materials are discussed using the updated PD model. In conclusion, the mechanical property of Graphite/Epoxy woven composites is deeply influenced by undulation angel compared to Eglass/Epoxy woven composites, because of the big difference of mechanical property between the two contents of the material; the effect of braid angel is comparatively larger than the undulation angel on the inplane mechanical property of woven composites; the overall volume fraction positively affects the bundle’s volume fraction, and there is an exponential relationship between the volume fraction and the mechanical property of the woven composite materials.