Underwater explosion can produce enormous shock acceleration in a very short duration, which could result in severe human injuries and degrade battle effectiveness seriously. Lumped parameter model, multi-body model and finite element model are commonly introduced to study the biodynamic response of shipboard personnel under vertical shock motion induced by underwater explosion. Each of the models has its advantages and limitations. Multi-body modeling method can supply possible useful information, provided it based on the most accurate human response data. Finite element modeling and its simulation provides a viable, cost effective alternative to live fire shock trials. Lumped parameter models emphasize larger scale information about human dynamic response. A model of hybrid form can be obtained by combining the finite element model and lumped parameter model. It has the potential not only to improve the analysis accuracy and spatial resolution but also to save the required computation time. Such hybrid form combining rigid body and FE techniques into one model can make full use of the advantages and offset the limitations of the each.