Abstract: Because the effectiveness evaluation of radar emitter signal recognition is in primary stage, a novel method which based on the an alytical hierarchy process(AHP) improved interval technique for order perference by similarity to ideal soliction(TOPSIS) for effectiveness evaluation of radar emitter signal recognition is put forward. There are three improved points in the novel method to solve the reversal phenomenon: using the AHP method to build weights; using theoretical extreme value to determine the ideal point and negative ideal point; using interval distance to compute the result, then the effectiveness evaluation of radar emitter signal recognition which based on the AHP improved interval TOPSIS could be got. At last a simulation is done, and the result proves that the novel method can solve the reversal phenomenon.