A　multi-curvature　correction　technique　for　a　classical　bandgap　reference　circuit　is　proposed　in　this　paper.　The　temperature　coefficient　could　reach　224.6m　ppm/°C　within　a　temperature　range　from-40　°C　to　125　°C　by　using　the　technique.　To　reach　such　a　lower　temperature　coefficient,　voltage　mode　compensation　and　sub-threshold　current　compensation　are　proposed　in　this　paper.　The　bandgap　reference　circuit　is　designed　based　on　a　standard　0.18\μ　m}$　CMOS　process,　which　could　achieve　a　power　supply　rejection　ratio　of-68　dB@1KHz.　The　circuit　covers　an　active　area　of　0.0217　mm2　and　verified　in　post　simulation　in　Cadence.　©　2019　IEEE.