This　paper　investigates　the　active　earth　pressure　of　inverted　T-type　retaining　walls　under　rotational　mode　using　a　slip-line　method　for　the　typical　failure　mechanism　simulated　with　adaptive　finite　element　software.　Considering　the　influence　of　the　heel　bottom　plate,　the　slip-line　field　calculation　models　for　the　inverted　T-type　retaining　wall　with　long　and　short　heels　were　established,　respectively.　The　limit　equilibrium　method　and　the　finite　difference　method　were　used　to　solve　the　stress　state　of　each　point.　The　earth　pressure　acting　on　the　stem　and　the　imaginary　wall　can　be　obtained　by　converting　the　boundary　conditions.　The　proposed　method　was　verified　by　comparison　with　results　from　the　finite　element　method　and　some　existing　theoretical　solutions.　In　addition,　several　extensive　parametric　studies　have　been　conducted　to　investigate　the　effects　of　heel　length　and　interface　strength.　The　results　show　that　increasing　the　heel　length　and　interface　strength　is　beneficial　for　maintaining　backfill　integrity　and　reducing　earth　pressure　against　the　stem　and　imaginary　wall.