The invention relates to a recycling and refining method of chloromethane. After being condensed by a chloromethane compressor, the coarse chloromethane gas from a washing tower end cooler enters into a chloromethane tower for refining in gas phrase state from an inlet under a return flow inlet of a coarse monomeric tower; the recycled chloromethane gas obtained from the upper lateral line of thechloromethane tower is directly led into a chloromethane superheater, is heated and then flows into a fluidized bed to carry out fluidized reaction. The invention improves the charging and discharging technical process of the present chloromethane refining tower and simplifies the unnecessary processes, which greatly reduces the investment to disposable equipment and the energy consumption in theproduction process, thereby reaching the purpose of saving equipment and energy.