Hypertension　and　cardiovascular　pathology　are　the　most　important　factors　in　the　occurrence　of　cardiovascular　diseases.　A　cardiovascular　disease　is　closely　linked　to　a　pulse　wave,　so　a　simple　and　real-time　portable　pulse　wave　detector　is　necessary　for　users.　In　this　paper,　to　collect　a　signal,　a　reflective　infrared　sensor　is　placed　in　a　special　ring.　Through　filtering　and　enlarging　the　pulse　wave　signal,　it　is　transformed　into　a　PC　to　be　analysed　and　displayed.　In　this　paper,　according　to　the　characteristics,　we　design　a　circuit,　and　then　print　and　weld　it.　Finally,　we　debug　circuit　to　make　sure　this　detector　is　feasible.　We　found　that　the　detector　had　a　good　dynamic　response　and　a　real-time　waveform　display.　Therefore,　it　shows　that　this　device　has　some　advantages　such　as　convenience　to　operate;　has　simple　and　intuitive　results,　long-time　monitoring,　and　has　real　practical　use　in　our　daily　lives.　It　can　detect　pulse　wave　fast　and　create　conditions　for　home　monitoring.　Furthermore,　the　device　shows　that　it　has　broad　prospects　for　commercial　use.　©　2015　Taylor　&　Francis　Group,　London.