Aiming at multivariate index weight is difficult to be determined in wireless sensor networks（WSNs）performance evaluation

propose a scheme using entropy weight method to determine multivariate index weight

and establish a weight decision-making model of entropy weight method to make an objective evaluation on network performance index.Using Opnet network simulation software

obtain data samples of different network performance parameters by changing node size.Data analysis shows that information entropy can objectively and accurately reflect amountof information provided by each index

and the entropy weight-based weight decision-making method can objectively reflect the relative importance of different network performance index.Meanwhile

the method has good flexibility and adaptability

and can be widely applied for evaluation of importance of performance index of other types of networks.