In order to improve the combing performance for qualty yarn,through analysis of combing performance as well as the factors involved with combing effect,conclusion is made that the factors involved with combed sliver includes installation of the needles of the top comb,the depth of needle embedding,specification of top comb.As a result,in order to improve the combing performance,the above-said factors should be considered with integration of cylinder combing and top combing.·545··546·