This　study　explores　the　enhancement　of　magnetohydrodynamic　(MHD)　performance　in　liquid　metals　through　the　addition　of　solid　insulating　powders,　with　a　focus　on　applications　in　fusion　reactors.　The　effects　of　varying　Al2O3　powder　volume　fractions　on　the　flow　velocity　and　electrical　conductivity　of　liquid　metal　under　a　uniform　magnetic　field　are　systematically　investigated.　Experimental　results　reveal　that　adding　Al2O3　powder　significantly　mitigates　the　MHD-induced　flow　velocity　drop,　particularly　at　higher　magnetic　field　strengths.　Three-dimensional　numerical　simulations　corroborate　these　findings,　demonstrating　strong　agreement　with　experimental　data.　An　optimal　Al2O3　volume　fraction　of　2%　is　identified,　which　maximizes　flow　velocity　under　a　magnetic　field,　while　further　increasing　the　powder　concentration　reduces　electrical　conductivity.　At　an　Al2O3　volume　fraction　of　3%,　the　electrical　conductivity　decreases　from　3.4　x　10(6)　S/m　to　1.95　x　10(6)　S/m.　The　composite　exhibits　improved　stability　after　sedimentation.　These　findings　provide　valuable　insights　for　optimizing　liquid　blanket　designs　in　fusion　reactors,　offering　a　practical　approach　to　mitigating　MHD　effects　and　enhancing　tritium　breeding　efficiency.