Abstract: The method of decision-making analysis on simulation test result is studied,which is the basis for estimating simulation credibility.To provide auxiliary decision-making support,a judgment method of simulation test result is presented based on confidence interval,and risk function of statistics decision-making is discussed.By comparing the confidence interval which comes from simulation sampling with the acceptance interval of evaluation index,an analysis method of fuzzy uniformity on simulation test result is discussed,and its result is expressed as a fuzzy number and may be used as reference news for perfecting model and optimizing index.It is illustrated with application in the simulation of underwater target radiated-noise that,the method has advantages on perfecting statistics decision-making and making the best use of feedback news of simulation exportation.