A　bismaleimide　(BMI)　resin　system　based　on　allyl　condensed　polynuclear　aromatic　resin　and　4,4′-bismaleimidodiphenyl　methane　was　prepared　in　this　paper.　The　chemical　structures　and　rheological　properties　of　the　resin　prepolymer　were　characterized　by　FTIR　and　viscometer,　respectively.　DSC　was　used　to　study　the　curing　reaction　of　the　resin　prepolymer,　and　TG-DTG　was　employed　to　study　the　thermal　behaviors　of　the　cured　resin.　Moreover,　physical　properties　of　the　BMI　resin,　including　mechanical　and　dielectric　properties,　were　studied.　The　results　showed　that　the　BMI　resin　had　good　thermo-stability,　good　mechanical　properties　and　excellent　dielectric　properties.　©　(2012)　Trans　Tech　Publications.