The fourth party logistics which acts as a new role will increasingly play more and more important functions. In this paper, for a given deformation problems of 4PL providers’ evaluation, We builds up a fourth party logistics evaluating indicator system based on four factors, which are quality, technical abilities, collaboration and price. Besides, we studies the analysis methods of grey correlation model and gives the definition of the correlation coefficient. Then we quantifies the index system and gives different weights to all evaluation indexes by calculating the grey relational grades. The studies show that different variable factors on the impact of choosing the fourth party logistics suppliers and it is more suitable in the practice than traditional methods.