As a new generation of two–dimensional carbon nanomaterials

graphene has excellent mechanical and electrical properties

and it is an ideal reinforcing material for the preparation of functional composites. Graphene can effectively improve the mechanical properties and electrical conductivity of graphene composites by combining with matrix materials. Polymer–matrix graphene composites can be used to prepare graphene flexible sensors

which has broad application prospects in structure health monitoring for composite material and human wearable devices. The basic properties of polymer–matrix graphene composites are introduced

based on this

the applications of flexible sensors in structure health monitoring and human wearable devices are analyzed. The progress of graphene flexible sensors in monitoring for strain of structure and human physiological motions are reported

and looking forward to the future developments of graphene flexible sensor.