Abstract: In order to overcome the problems of oversize pores and poor roundness of cooling base rod for heated tobacco products, a cooling material prefolding and funneling system was designed. The system consists of a hot-pressing device, a folding device, a funneling device and a rear feeder. The system is installed between the cooling material unwinding and embossing machine and a ZL22D filter rod maker. The multi-stage phase change cooling polymer film coated paper is hot-pressed, folded, funneled and compressed and finally becomes a continuous round rod before entering the garniture to ease the radial stress of the film-coated paper. The designed system was tested with making 9J11 Chinese style flue-cured tobacco cooling base rods on a ZL22D filter rod maker, the results showed that the roundness acceptable rate of the cooling base rods increased by 72 percentage points on average, and the acceptable rate of the rod end porosity reached 100%. This technology provides support for improving the quality of filter rods for heated tobacco products.