The invention relates to a cooling system for circulating air cooling of a feeding part of a cigarette making machine. The system comprises two cooling tubes, a fluidized bed, an air distribution box and a compressed air source, a fan is installed on a top machine plate of the feeding part of the cigarette making machine, the two cooling tubes are each connected with the top machine plate of the feeding part of the cigarette making machine through a support, and the fan is located under the two cooling tubes; air outlets of the two cooling tubes are each connected with the air distribution box through a first hose connection piece, air inlets of the two cooling tubes are each connected with the compressed air source through a second hose connection piece, the fluidized bed is connected with the air distribution box, a bottom air blowing groove of the fluidized bed is connected with the cigarette making machine, a top air blowing groove of the fluidized bed is connected with a cyclone dust collector, one end of the cyclone dust collector is connected with a negative-pressure pipeline of a central dust removal system, and the other end of the cyclone dust collector is connected with the air distribution box through a circulating fan. By means of the cooling system for the circulating air cooling of the feeding part of the cigarette making machine, the stability of moisture in cut tobacco is improved, and unnecessary fragrance loss of cut tobacco is reduced.