Abstract: A synthetic optimization model of navigational performances for the high-speed ships is set up. Genetic chaos algorithm is proposed,which is composed of the genetic algorithm and the chaos algorithm, And this algorithm is applied to optimize numerical results of synthetic optimization of navigational performances for the high-speed monohull ships,the software with friendly interface is programmed by VC++. The calculation results show that this software can conveniently get the possibility distributing function of integrate optimum navigation performance of each design variables, and can show that the latter is reliable and effective which provides fine support to the design of highspeed ships form with excellent synthetic performances.