The invention provides a rotary cutting type chip-less plastic pipe cutting system. The system comprises a bottom plate, an electric cylinder device, a pull-up device, a fixing device, a dust collecting device, a pushing device and a cutting device; the bottom plate is provided with first supporting rods, first horizontal rods and a second horizontal rod; the electric cylinder device comprises a first electric cylinder, a first support, a first pushing rod, a third horizontal rod and a first inclined rod; the pull-up device comprises a first vertical rod, a first roll wheel, first pull wires, an elastic plate, first fixed rods and first pressing blocks; the fixing device comprises a cushion block, a locating ring, an abutting rod, a second electric cylinder, a second support, a second supporting rod, a fourth horizontal rod, a second inclined rod, a fifth horizontal rod and a second vertical rod; the dust collecting device comprises a dust collection hopper, a first frame body, a fixing block, a second frame body, a pipeline and a fan; and the pushing device comprises a third electric cylinder, a fourth support, a second pushing rod, first vertical plates, seventh horizontal rods and first springs. According to the system, plastic pipes can be effectively cut, the cutting efficiency is high, and the speed is high.