The　production　of　Integrated　circuits　(ICs)　generates　wastewater　with　a　high　concentration　of　residual　fluoride　ions,　necessitating　highly　efficient　fluorine　removal　methods.　In　this　study,　a　novel　composite　carrier　was　developed　using　a　hydrothermal　synthesis　method　to　load　Al-MOF　and　biochar　(BC)　onto　polyurethane　foam　(PUF),　resulting　in　the　composite　foam　of　Al-MOF-PUF@BC.　The　results　showed　that　the　composite　carrier　exhibited　a　stable　fluoride　removal　effect,　with　a　maximum　adsorption　capacity　of　16.52　mg/g　at　room　temperature.　The　adsorption　isotherm　curves　were　consistent　with　the　Langmuir　isotherm　model,　and　the　adsorption　kinetics　were　well-described　by　the　pseudo-first-order　model.　The　mechanism　of　fluorine　adsorption　on　Al-MOF-PUF@BC　was　ligand　exchange　with　hydroxyl　groups　and　the　formation　of　F[sbnd]Al　bonds.　Density　functional　theory　(DFT)　calculations　revealed　that　the　adsorption　energy　reached　−246.7　eV,　indicating　stable　adsorption　for　fluoride　ions.　The　composite　foam　demonstrated　excellent　regenerative　properties　and　was　effective　for　fluoride　removal　in　actual　IC　wastewater.　©　2023