SiCp/A356　composites　containing　20%　(volume　fraction)　SiC　and　three　kinds　of　different　filler　metals　were　investigated　by　vacuum　brazing　process.　Brazability　of　SiCp/A356　composites　was　analyzed　after　nickel　plating　on　the　surface　of　composites　and　without　nickel　plating　process.　The　effects　of　holding　time　on　microstructure　of　the　brazed　joints　of　SiCp/A356　composite　were　studied　by　metallographic　microscope,　SEM　and　Energy　spectrum　analysis.　The　results　show　that　nickel　plating　on　the　surface　of　composite　contribute　to　improve　brazability　of　SiCp/A356　composites　prominently,　while　inferior　brazability　displayed　without　nickel　plating　on　the　surface　of　composites.　Hardness　of　joints　brazed　at　holding　time　of　6　min,　8　min　and　10　min　were　studied,　consequently　the　hardness　of　the　weld　seam　region　is　the　highest　when　the　holding　time　was　8　min.