Abstract: The effect of generations and content of hyperbranched poly（amine-ester） on the impact and rheological properties of the blends of hyperbranched poly（amineester）/PVC are investigated.The micro-configuration of the break surface of the blends is characterized by SEM.The results show that: The extra added hyperbranched poly（amine-ester） can improve the mechanical properties of PVC,and the generation and content of hyperbranched poly（amine-ester） can affect the impact strength of the blends which may reach the maximum value when the content of hyperbranched poly（amine-ester） of third generation is 5%,the impact strength is 42.5 kJ/m².The melt rheology measurements showed a reduced complex viscosity gradually for blends and the blends rheological behavior appeared toward Newtonian behavior gradually as the content of hyperbranched poly（amine-ester） increased.Therefore,the PVC materials can be processed at lower temperature in case of possible degradation of PVC at high temperatures.