Abstract: The model of new-type rotors with three edges in a double-rotor continuous mixer was built and a three-dimensional non-Newtonian isothermal simulation of the dynamic flow field of rotors with different wedge angles was conducted using the polymer processing analysis software POLYFLOW, the residence time distribution of the flow field in the rotor, cumulative max shear stress distribution, weighted average shear stress and segregation scale were obtained by statistical method. The results showed that rotors with smaller wedge angle had a better dispersing mixing performance and its distribution mixing performance was not that good, while rotors with bigger wedge angle had a better distribution mixing performance, but its dispersing mixing performance was poor. The new-type rotors possessed the best dispersing and distribution performance when the wedge angle was around 15°.