This　article　proposes　a　power　management　circuit　for　wireless　energy,　transmission　and　power　supply　of　wearable　devices.　As　the　wearable　device　becomes　smaller　and　smaller,　a　power　management　circuit　based　on　a　switched　capacitor　network　and　a　beta-Multiplier　Voltage　Reference　circuit　is　designed.　The　circuit　structure　of　the　chip　is　fabricated　by　SMIC0.1.8　CMOS　process,　and　its　power　characteristics　and　RF　signal　are　analyzed　theoretically　and　experimentally.　The　operating　frequency　range　of　the　circuit　is　800MHz-1.5GHz,　the　output　voltage　of　the　power　supply　is　stable　1.8V,　the　total　is　less　than　16　mu　w,　and　it　can　be　effectively　controlled　by　the　radio　frequency　signal.