Heat　transfer　characteristics　of　the　CO2-based　foam　fracturing　fluid　were　investigated　on　the　large-scale　test　loop　of　foam　fracturing　fluid.　The　relationship　between　thermal　conductivity　coefficient　and　shear　rate　was　introduced　into　the　expression　of　the　convective　heat　transfer　coefficient.　Thus　the　expression　of　the　convective　heat　transfer　coefficient　of　power-law　fluid　was　revised.　The　results　show　that　the　convective　heat　transfer　coefficient　of　the　fracturing　fluid　increases　with　the　increase　of　the　pressure,　the　foam　quality　and　the　shear　rate.　The　convective　heat　transfer　coefficient　of　the　foam　fracturing　fluid　calculated　by　the　revised　calculation　formula　is　highly　consistent　with　the　experimental　data　at　low　pressure.　The　deviation　is　bigger　at　high　pressure,　but　still　within　20%.