Abstract: In order to study the infrared radiation characteristics of the saturated sandstone during the uniaxial compression，the fractal dimension of the infrared temperature field of the saturated sandstone is calculated by the box dimension method.The fractal dimension of the saturated temperature field of the saturated sandstone fractal characteristics.The results show that the fractal dimension of the infrared temperature field can not only characterize the geometric characteristics of the crack development during the deformation process of the saturated sandstone，but also the dynamic characteristics of the crack development process.In terms of variance，the fractal dimension is the rock loading process the fractal dimension is better than the variance in the elastic phase and the infrared precursors that characterize the rupture of the saturated sandstone specimen.