The Infrared radiation experiments on FRP bolt in the process of loading were carried out. The result showed that the infrared radiation temperature (IRT) of FRP bolt rose with increase of loading. The IRT increased small at the stage of elastic and obviously during plastic stage. In particular, the IRT rose quickly while approached fracture. The maximum rose 0.3℃.The IRT characteristics can be used to analyse the stress, strain and deformation in the process of FRP bolt and rock interaction.