The　new　generation　power　line　carrier　communication　system　adopts　dual-mode　communication　mode,　which　supports　both　power　line　wired　transmission　and　wireless　transmission　(Power　line　communication,　PLC)　[1].　The　wireless　channel　adopts　470MHZ　-　510MHZ　to　realize　the　long-distance　transmission　of　data,　and　uses　wireless　transmission　when　the　power　line　wired　transmission　is　not　smooth,　and　successfully　realizes　the　power　line　communication　of　electric　meters.　However,　in　wireless　communication,　it　is　vulnerable　to　serious　clutter　interference.　In　order　to　improve　the　quality　of　communication,　a　method　to　reduce　the　noise　of　power　line　carrier　communication　is　proposed,　and　a　set　of　AGC　algorithms　applied　in　self-developed　power　line　carrier　communication　is　designed　by　using　digital-analog　hybrid　automatic　gain　control　with　the　method　of　average　energy　calculation,　which　can　reduce　the　interference　of　noise　signals　in　power　line　carrier　communication,　and　the　programming　and　corresponding　timing　analysis　are　carried　out　in　FPGA,　and　through　the　RF　The　results　show　that　the　signal　noise　intensity　can　be　effectively　reduced　when　the　signal　with　higher　energy　is　input.　©　2022　IEEE.