The　paper　firstly　proposes　a　coupling　resonance　method　in　which　subgroup　method　is　employed　in　the　serried　peak　energy　region,　and　wavelet　expansion　method　is　employed　in　single　peak　energy　region.　The　original　subgroup　model　and　wavelet　expansion　model　are　improved　and　coupled　through　the　calculation　of　scattering　source　from　subgroup　to　wavelet　expansion,　so　that　the　self-shielding　cross　section　in　the　whole　energy　region　can　be　calculated　accurately.　To　verify　these　theories　and　to　prove　the　improvements,　a　PWR　cell　benchmark　problem　is　calculated.　It　is　demonstrated　that,　compared　with　other　traditional　multi-group　resonance　methods　and　continuous　energy　resonance　method,　this　coupling　resonance　method　has　the　ability　to　accurately　calculate　the　whole　energy　region＇s　self-shielding　cross　section　while　keeping　enough　efficiency　and　finally　has　an　ability　to　offer　the　accurate　self-shielding　parameters　for　latter　transport　calculation.　©,　2014,　Yuan　Zi　Neng　Chuban　She.　All　right　reserved.