In this paper,we consider a class of impulsive differential equation model with impulsive infusing immune factors to treat HTV infection,and then analyze the stability of the equilibrium points in both cases that presence or absence of pulse immune responses.Then we obtain the sufficient conditions for the global stability of the infection-free equilibrium and the local stability of the other two infection equilibrias,and give a sufficient condition for the global stability of disease-free periodic solution with pulse immune response.Further more we give a reasonable estimate of the time inter...