The higher requirements is put forward for the design of mechanical seals under high temperature,high pressure,high speed and other extreme conditions.Based on the analysis of high parameter mechanical seal structure,working conditions and damaged parts,the static ring friction pair compatibility design method was put forward.The core of this method is to consider the compatibility between graphite and stainless steel in the design process of mechanical seal static ring friction pair.The compatibility is judged by whether the thermal stress of graphite ring exceeds the allowable value of mechanical strength.The finite element simulation model of static ring friction pair was established,and the compatibility problem of static ring friction pair was illustrated by an example.The results show that the thermal stress of the graphite ring of the static ring friction pair of the mechanical seal can be adjusted by the compatibility design,and the failure of the mechanical seal can be reduced under the condition of high parameters.