In　order　to　investigate　the　dehumidification　strengthening　effect　of　multichannel　flat　tube　thermal　effect　and　analyze　its　strengthening　mechanism,　a　corrugated　fins-multichannel　flat　tube　based　internally　cooled　dehumidifier　structure　is　designed.　The　optimum　dehumidifier　flow　type　was　determined　and　the　dehumidification　strengthening　characteristics　and　thermal　mechanism　of　the　multichannel　flat　tube　under　different　air　and　cold　source　conditions　were　experimentally　analyzed.　The　results　showed　that　the　flow　type　B2　(air-solution　countercurrent　and　water-solution　countercurrent)　had　the　best　dehumidification　performance.　High-temperature　and　high-humidity　environments　can　worsen　the　dehumidification　strengthening　effect　of　the　multichannel　flat　tube　and　the　effective　utilization　of　cooling　power,　although　high　humidity　has　a　stronger　inhibitory　effect,　its　inhibition　mechanism　is　different.　When　the　inlet　air　humidity　is　25.8　g/kg,　the　dehumidification　performance　increases　by　up　to　16.6%;　Decreasing　the　inlet　water　temperature　and　increasing　the　inlet　water　flow　significantly　improved　the　dehumidification　strengthening　effect　of　the　multichannel　flat　tube.　Furthermore,　the　multichannel　flat　tube　can　eliminate　100%　of　total　heat　when　the　inlet　water　temperature　is　below　20.7　degrees　C.