In　this　study,　enzyme-induced　carbonate　precipitation　(EICP)　combined　with　xanthan　gum　curing　technology　was　used　to　improve　the　engineering　properties　of　standard　sand,　and　the　curing　effect　of　EICP　combined　with　different　xanthan　gum　contents　was　studied　by　macroscopic　tests　such　as　unconfined　compressive　strength,　direct　shear,　permeability,　calcium　carbonate　content,　and　microscopic　tests　such　as　scanning　electron　microscope　and　nuclear　magnetic　resonance.　The　results　show　that　the　unconfined　compressive　strength,　shear　strength,　cohesion　and　internal　friction　angle　of　EICP　combined　with　xanthan　gum　solidified　sand　increases　with　the　increase　of　xanthan　gum　content　and　reaches　the　maximum　value　at　the　content　of　2%,　in　which　the　increase　of　unconfined　compressive　strength,　shear　strength,　and　cohesion　is　significant;　further,　the　increase　of　internal　friction　angle　is　small.　The　permeability　coefficient　of　EICP　combined　with　xanthan　gum　solidified　sand　decreases　with　the　increase　of　xanthan　gum　content,　and　the　permeability　coefficient　of　2%　xanthan　gum　is　only　65.4%　that　of　pure　EICP　treatment.　The　incorporation　of　xanthan　gum　promotes　the　deposition　of　calcium　carbonate,　increases　the　viscosity　of　the　reaction　solution,　and　produces　colloidal　encapsulation　and　bonding　effect　on　the　sand　particles.　In　addition,　the　incorporation　of　xanthan　gum　effectively　reduces　the　porosity　of　solidified　sand　and　greatly　reduces　the　proportion　of　large　pores　and　medium　pores　by　changing　the　pore　size,　which　greatly　improves　the　pore　structure.