Rheological properties of Propylene/Polystyrene blends with different mass ratio under different temperature and vibration conditions were investigated by using self-made multifunctional all-electric polymer rheometer. The result showed that: The viscosity of blends increased after a decline with the increase of Polystyrene content within a lower shear rate range (< 400 s-1). The critical mass ratio of Polystyrenes to Propylene was 1:1. However, the viscosity of blends was hardly influenced by the mass ratio within a higher shear rate range (> 400 s-1) and the wall shear stress increased. The influence of vibration frequency on blends rheological property fluctuated. As for the blends with the mass ratio of 4:6, the optimized processing parameter was 15 Hz. The vibration amplitude effectively reduced the wall shear stress and viscosity of the blends. The introduction of vibration force field into polymer processing can significantly lower the processing temperature, effectively save energy consumption and is important for polymer molding.