Aiming at the shortcomings of the traditional equipment test factor screening method,such as unreasonable test scheme design and low credibility of factor screening results,an equipment test factor screening method based on credibility is proposed.Firstly,the uniform experimental design method is used to construct a scientific experimental scheme,so as to obtain more experimental information with fewer experimental times and improve the experimental efficiency.Secondly,the absolute grey correlation method is used to calculate the correlation degree of the test factors,and arrange them from large to small;On the basis of the ranking of correlation degree,the research on the credibility of factor screening is carried out,and the credibility of factor screening is reflected by an intuitive measure.Finally,the rationality and feasibility of the method are verified by case simulation.