Abstract: The design technology for high temperature tolerance frequency selective surface (FSS) radome is the major research interests in radome field. In high speed or high power case, the temperature in the radome can be as high as thousands degrees. In this paper an exploratory study on design technology for high temperature tolerance frequency selective surface radome is made. The theoretical radome model by which high transmission can be obtained in wide-angle and wide-band with sharp frequency selectivity is introduced. The voltage, current and temperature distribution in the miniaturized-element frequency selective surfaces cell composed by series of inductive and capacitive surface under high power incidental electromagnetic wave are analyzed in details. The idea or direction to these problems is discussed. The simulation analysis has demonstrated that the systematical electromagnetic and thermal design can increase the temperature tolerance of FSS radome. In this paper many kinds of material suitable for high temperature are introduced. The transmission increase in large incidence angle, RCS suppression and nonlinear problem are discussed which can be provided for engineering design as reference.