Base isolation structures with general rubber bear will impact with adjacent buildings easily for the excessive horizontal displacement under strong earthquake.In this paper,using nonlinearity pounding element,the pounding model of adjacent isolated structures with prestressed rubber bears is built, and the pounding dynamic equation is deduced.On this basis,the influence of prestressed rubber bear to the pounding of adjacent structures is studied, and the influencing factor of pounding is analysed.The results show that:Compared to general RB,PRB can reduce effectively the horizontal displacement of isolated structures, and minish the pounding responses of adjacent structures.