Abstract: To investigate the transverse compression deformation mechanism of high performance fiber bundles, by mean of ANSYS parametric design language (APDL) with commercial finite element codes ANSYS, a 3D statistical generation-growth numerical model was proposed to generate a micro morphology of continuous fiber bundle. Both the random distribution and the misalignment of fiber in the generation were considered. Penetration of any two fibers was not allowed physically which was also reflected in the protocol. On the base of the generation-growth numerical model, the transverse compression deformation of high performance fiber bundles was simulated. The numerical simulation is not only consistent with the non-linear compression loading curves of experiments, but also allows the identification of the power laws to represent the evolutions of the compressive load and the fiber volume fraction.