To　investigate　the　effect　of　alkaline-earth　metal　doping　on　the　multiferroic　of　BiFeO3　ceramics,　BiFeO3　and　Bi0.9A0.1FeO3(A=Ca,　Sr,　Ba)　ceramics　were　successfully　prepared　by　solid　phase　method,　and　their　ferroelectric　as　well　as　ferromagnetic　properties　were　studied.　XRD　results　showed　that　all　samples　could　be　indexed　to　be　the　hexagonal　perovskite　structure　with　space　group　R3c.　The　lattice　parameters　increase　first　and　then　decrease　with　the　increase　of　the　radius　of　doping　ions.　Electrical　measurements　showed　that　ferroelectric　polarization　as　well　as　leakage　current　density　of　Bi0.9A0.1FeO3　ceramic　increases　with　increasing　the　radius　of　doping　ions.　Taken　the　XPS　analysis　into　account,　we　conclude　that　both　structure　distortion　and　the　change　of　oxygen　vacancy　concentration　impact　the　ferroelectric　properties.　Under　a　magnetic　field　of　14　T　the　magnetizations　of　BFO,　BCFO,　BSFO,　BBFO　ceramic　are　around　0.150,　0.356,　0.497　and　0.995　emu/g,　respectively.　The　distortion　of　the　antiferromagnetic　structure　and　the　variation　of　the　Fe　ions　in　Bi0.9A0.1FeO3　ceramics　are　responsible　for　the　enhancement　of　the　ferromagnetism.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.