Tungsten　and　vanadium　are　efficiently　extracted　from　honeycomb-type　spent　selective　catalytic　reduction　(SCR)　catalyst　by　using　a　high　pressure　alkali　leaching　method.　Theoretical　thermodynamics　calculation　indicates　that　WO3　and　V2　O5　are　soluble　in　sodium　hydroxide　solution,　proving　that　the　extraction　of　Wand　V　from　the　spent　SCR　catalyst　by　high　pressure　alkaline　leaching　is　feasible.　The　effects　of　NaOH　concentration,　leaching　temperature　and　time,　liquid-solid　ratio　and　stirring　speed　on　leaching　efficiency　of　W　and　V　are　systematically　investigated.　The　leaching　efficiency　of　W　and　V　is　94.3%　and　91.2%,　respectively,　under　the　optimal　conditions:　the　NaOH　concentration　of　2mol/L,　the　leaching　temperature　463.5　K,　the　reaction　time　3　h,　solid-liquid　ratio　0.1　g/ml,　the　stirring　speed　of　400　r/min.　The　TiO2　residue　is　in　anatase　crystalline　phase.　©　2018　Trans　Tech　Publications,　Switzerland.