In　this　study,　a　multi-lead　wearable　ECG　signal　device　is　designed,　which　can　simultaneously　acquire　the　electrocardiograms　of　three　leads　(I,　II,　and　V1)　and　be　placed　on　the　human　body　by　ECG　test　clothing.　To　meet　the　low　power　requirements　of　wearable　devices,　the　hardware　and　software　are　designed　at　the　same　time.　Results　show　that　the　ECG　waveforms　collected　by　this　device　are　clear,　and　each　waveform　is　complete.　When　the　low　power　design　on　the　device　is　implemented,　the　power　consumption　of　the　entire　device　decreases　by　31%.　©　2019　IEEE.