With the increasing performance requirements of the temperature sensor, to develop a new high-performance temperature sensor is of great significance .With graphene as the nanofiller and epoxy resin as the matrix, various of graphene/epoxy nanocomposite with different graphene addition were prepared by ultrasonic and planetary stirring. Electrodes were attached at both ends of the graphene/epoxy nanocomposite sheet to form the temperature sensor. The effects of graphene addition on the temperature-resistance properties of the nanocomposites were investigated at the temperature range of 30 °C-100 °C. The results showed that the resistance of the temperature sensor specimen decreased linearly with the increasing temperature, which demonstrated a negative temperature coefficient (NTC) effect. In addition, it is found that the higher the graphene content, the magnitude of the resistance change was smaller. After three thermal cycle treatments, the temperature-resistance relationship of the sensor tends to be stable.