Abstract: In this essay,the spinning techniques are optimized with the method of factor analysis.The yarns spun with four different techniques are evaluated by this method in which two common factors(fineness unevenness and tenacity) are extracted from the 7 yarn quality indexes.The accumulative contribution percentage of the two factors is up to 91.813%,most of the information included in the yarn quality indexes is reflected by these two factors.Then the score of each factor is calculated and yarn quality is evaluated accordingly.On this basis,the spinning techniques are optimized.The conclusion drawn here is in good agreement with spinning practices,so it is testified that this is a feasible and outstanding method for optimizing spinning techniques.