Aimed at the shortcomings of the airborne radar's stealth performance evaluation from the Schleher interception factor, this paper, in two aspects of the stealth performances of radar radiation signals and radiation strategies, analyzes in detail eight factors which affect the radar RF stealth performance, and constructs an evaluation index system of the RF stealth performance of airborne radars. In the light of the problems of uncertainty and ambiguity existing in some indexes, the index system is comprehensively and quantitatively assessed by using a gray analytic hierarchy process (GAHP) method, and the stealth performances of three types of airborne radars are evaluated. The simulation results show that the method can evaluate the RF stealth performance of airborne radars effectively.