Abstract: GMPLS is the nucleus of next generation network technology. The research on the restoration method for the GMPLS are mostly using the concept of traditional method, but the features of GMPLS about recovery technology make the restoration method has some special requirements. In this paper, we first discuss some problems, which occur in GMPLS's fault recovery. Based on this, the article proposes a new GMPLS recovery algorithm based on constrained (CGR), and describes how to set the constrain conditions. We apply this algorithm in mesh network and give the implement and feature. These methods draw on the experience of the traditional recovery techniques and also fully consider the properties in GMPLS, so make it successable and compatible.