Abstract: To design an evaluation method for third-party logistics providers (3PLPs) , an evaluation system consisting of 15 classification criteria was proposed, and its each criterion was graded into 5 levels. Three steps are included in evaluatingthe third-party logistics providers (3PLPs). The first is togive all the 3PLP candidates a score one by one for each criterion, varying from the highest 5 to the lowest 1. The second is to compare two 3PLP candidates with a classification criterion each time, and after all the candidates have been taken into account, 15 relative priority matrixes can be obtained and their eigenvalue attribute vectors can also be computed. The third is to design a nonparametric frontier algorithm with a constraint of an ordered set of preference weights for the classification criteria, so a sorted priority vector of the 3PLP candidates can be gained by using this algorithm to provide enterprises with an evidence for selecting a 3PLP. At the end, 2 verifying cases were designed to validate the reliability of the evaluation model.