A　radial　artery　and　finger　photoplethysmography　(PPG)　pulse　wave　velocity　(PWV)　noninvasive　detecting　instrument　is　designed　This　instrument　detects　radial　artery　pulse　wave　and　finger　PPG　pulse　wave　synchronously,　and　then　radial-finger　pulse　wave　velocity　(PWV(rf))　is　computed　The　hardware　adopts　two　separate　circuits　to　reduce　interference　between　the　coinstantaneous　radial　artery　pulse　wave　detection　and　finger　PPG　pulse　wave　detection.　Moreover,　the　software　can　store　detection　results　for　dynamic　analysis.　The　instrument　has　the　advantage　of　convenience.　It　is　noninvasive　and　has　good　clinical　value　in　the　detection　of　PWV.