The invention discloses a reliability modeling method and a prediction method for stone peak strain at high temperature. The stone is widely applied to the field of constructional engineering, and thehigh-temperature performance of the stone is very important for the safety of a building structure under fire. In addition, in the geological environment of projects such as deep resource mining, underground coal gasification, geothermal resource development and high-radioactivity nuclear waste storage, the rock engineering structure may experience a certain degree of high temperature. And the high temperature can cause the mechanical property of the stone to be degraded, so that the structural safety is reduced. According to the method, a Frechet distribution function is innovatively adoptedto describe the distribution law of the measured values of the stone peak strain. The reliability modeling method and the prediction method for the stone peak strain at the high temperature are invented, and technical support is provided for damage evaluation and prediction of the stone under the high temperature effect in building structures and rock engineering.