Phosphate　recovery　from　water　is　essential　for　reducing　water　eutrophication　and　alleviating　the　phosphorus　resource　crisis.　In　this　study,　spent　coffee　grounds　and　CaCl2　were　used　as　raw　materials　and　a　modifier,　respectively,　to　create　a　novel　calcium　modified　biochar　(MBC)　for　removing　phosphorus　from　water.　The　modified　biochar　(MBC)　was　the　best　at　removing　phosphorous　when　the　modifier　concentration　was　1.5　M　with　theoretically　maximum　adsorption　capacity　of　70.26　mg/g.　MBC　also　performed　well　in　the　wide　pH　range　of　3-11　under　different　phosphorus　concentration　gradients,　with　phosphorus　removal　efficiency　of　more　than　50　%.　According　to　kinetic　analysis,　the　adsorption　process　at　low　phosphorus　concentrations　(50-100　mg/L)　can　be　more　properly　described　by　the　pseudo-first-order　model,　while　the　pseudo-second-order　model　best　describes　the　adsorption　process　at　high　concentrations　(200-600　mg/L).　The　thermodynamic　analysis　indicated　that　the　adsorption　process　was　spontaneous　and　endothermic.　Characterization　results　revealed　that　surface　precipita-tion,　complexation,　and　ligand　exchange　were　the　dominant　mechanisms　of　phosphorus　adsorption.　MBC　has　great　potential　to　recover　phosphorus　from　wastewater.