In　this　research,　we　used　a　slip-line　method　for　a　typical　failure　mechanism　simulated　with　adaptive　finite-element　software　to　investigate　the　active　earth　pressure　of　narrow　and　layered　backfills　against　inverted　T-type　retaining　walls　rotating　around　the　base　mode.　The　slip-line　field　calculation　models　for　the　inverted　T-type　retaining　wall　with　narrow　and　layered　backfills　were　established　considering　the　effect　of　the　heel　bottom　plate　and　the　inverted　T-type　retaining　wall　characteristics.　Subsequently,　the　limit　equilibrium　and　finite　difference　methods　were　used　to　solve　the　stress　state　of　each　point.　The　earth　pressure　acting　on　the　stem　and　the　second　failure　surface　can　be　obtained　by　converting　the　boundary　conditions.　The　proposed　method　was　verified　by　comparing　its　results　with　those　from　finite-element　limit　analysis　and　existing　theoretical　solutions.　Furthermore,　several　extensive　parametric　studies　have　investigated　the　effects　of　backfill　width,　heel　length,　and　interface　strength.　The　results　show　that　increasing　interface　strength　and　decreasing　backfill　width　help　reduce　the　earth　pressure　against　the　stem　and　second　failure　surface.　The　change　in　the　length　of　the　heel　bottom　plate　exhibited　a　dual　effect.