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To reduce the implementation complexity and excessive overhead caused by remote attestation,we propose a new remote attestation scheme based on trusted level measurement considering the limited system resources of the Intelligent electronic devices (IEDs) in smart grid.In this scheme,a lightweight trusted level measurement mechanism is designed,and a new dy-namic weighted multi-classifier integration method based on Binary tree Support vector machine (BT-SVM) is proposed.The trusted level of configuration information and running state of an IED are measured through trusted third party.The measurement parameters and attestation period are dynamically adjusted according to different trusted levels of an IED,so that reducing computational overhead and communication delays in remote attestation process.Analysis and experiments show that the proposed scheme can enhance the security of IEDs in smart grid by occupying a small amount of computation and communication resources.