Polypropylene (PP) pipes have been widely used as gas or water transport pipes owing to their comprehensive advantages.However,the conventionally extruded PP pipes are poor in the hoop strength,impact strength and crack resistance.Therefore,how to prepare PP pipe with excellent performance to meet the universal requirements is of great significance.This paper reported a novel rotation extrusion technique to prepare PP pipes with higher performances.This technique has the following features:independent and adjustable rotary drive systems of both mandrel and die to realize 4 different rotation modes;a unique structure to realize the simultaneously cooling of the inner and outer walls.As a result,the stress and temperature fields during PP pipe extrusion can be easily controlled,so as to adjust the rheological behavior and the formations of the multi-level and multi-scale structure of polymers.