Under the environment of intelligent manufacturing, supplier efficiency evaluation is very important for the development of intelligent manufacturing enterprises. This study constructs the supplier efficiency evaluation index system of intelligent manufacturing enterprises according to the characteristics of suppliers, the construction principles of evaluation index system, and literature summary. The weights of each index are determined by AHP-entropy method, and the supplier is graded by using the enterprise data of subject cooperation and BP neural network. The improvement suggestions for suppliers are put forward and further cooperation and communication between enterprises and suppliers are promoted. The example results show that this method has strong practicability for supplier efficiency evaluation.