The　intelligibility,　the　definition　and　the　Comfort　for　digital　hearing　aids　were　reduced　because　of　distorting　formant　of　speech　resulted　by　the　existing　loudness　compensation　method(LCM).　In　order　to　solve　these　problems,　a　LCM　based　on　human　auditory　is　proposed　in　this　paper.　This　method　adopts　gammatone　filter　banks　which　can　simulate　the　auditory　model　of　human　ear　cochlea.　Input　signal　is　divided　into　32　frequency　bands　by　the　filter　banks.　And　then　signal　of　each　frequency　band　is　compressed　or　amplified　in　accordance　with　the　curve　of　hearing　impaired.　Experimental　results　show　that　the　performance　of　the　proposed　method　is　better　than　the　multi-channel　LCM　based　on　Bark　filters.