Abstract: We have a preliminary discussion on the configuration optimization of a new kind of underwater vehicle-Underwater Glider.After studying the shape optimization of the glider,we get an optimized shape design by means of the union simulation of CFX and Matlab.The results show that the union simulation has achieved some good effect,and it has a practical significance for reducing the period and cost of model experiments as well as for studying the underwater vehicle's hydrodynamic design,especially for design in scheme design phase.