A　novel　metamaterial　plate　with　subwavelength　lever-type　resonators　is　proposed　to　obtain　low　frequency　broadband　band　gaps　and　good　sound　insulation　performance.　The　band　structure　is　theoretically　derived,　and　the　validity　of　the　theoretical　method　is　verified　by　the　finite　element　method.　The　formation　mechanisms　of　the　band　gaps　are　illustrated　by　the　analysis　of　the　effective　dynamic　mass　density　and　group　velocity.　The　effect　of　the　lever　ratio　on　the　band　gaps　is　analyzed.　The　results　indicate　that　as　the　lever　ratio　increases,　the　first　band　gap　shifts　to　lower　frequencies,　while　the　bandwidth　is　widened.　Moreover,　the　sound　insulation　performance　of　the　proposed　metamaterial　plate　is　evaluated　via　examining　the　sound　transmission　loss　(STL).　Compared　with　the　metamaterial　plates　without　lever　accessories,　the　proposed　metamaterial　plates　with　a　suitable　lever　ratio　have　better　sound　insulation　performance　at　low　frequencies.