This study was aimed to analyze medication experiences of Professor Sun Zixue in the treatment of asthenospermia. A total of 286 asthenospermia cases treated by Prof. Sun Zixue were collected. Frequency and index clustering analysis method were used in the processing of patient data. The results showed that the using frequency of 37 types of drugs is more than 10%. And the clustering analysis classified drugs into seven cat-egories , which were the kidney essence tonification , kidney-yang tonification , qi tonification , blood nourish-ment , heat-toxin reducing , heat-dampness reducing , blood-activation and collateral-regulation. It was conclud-ed that based on Prof. Sunˊs syndrome differentiation , the treatment of asthenospermia can be from the combi-nation of kidney tonification , qi tonification and blood nourishment , or the combination of heat-dampness re-ducing and blood-activation and stasis-removing , or the combination of kidney tonification and collateral-regu-lation. The commonly used drugs are 38 types from seven categories .