The technique for order preference by similarity to ideal solution(TOPSIS)was applied to evaluate the performance of third party logistics enterprises(3PLs)and to make decision of outsourcing the logistics services.By means of analyzing the factors affecting states of operations in 3PLs,evaluat- ing indicators were set up and an evaluation model was constructed.Then states of operations in differ- ent 3PLs were evaluated synthetically based on TOPSIS.The results show that the method is more ef- ficient in the use of historical business data,more objective in evaluation and more accurate in decision -making.