Abstract: High pevfornace absorber has been designed according to EMW-absorber non-reflection curve.But traditional non-reflection curve is suitable for monolayer absorber,not for resonance absorbers.Theoretical research on λ/4 absorber manifests that non-reflection curve can also be established for resonance absorber.The characteristics of the curve are related to resistance value.It is more universal and makes the traditional curve a special case(R=∞).The two kinds of curves can be transformed to each other.This new theory provides reference for the design of advanced EMW-absorbers.