本文依据实验中所观察到的现象．建议用四个指标估计混凝土坝和土坝接头的抗 震性能．第一．用混凝土坝和土坝心墙接触面的动静压力比估计防渗体的松脱程度； 第二，用有、无接头时土坝坝面初始开裂的振动历时之比及心墙最大地震应力比估计 接头对土坝地震反应的影响：第三，用土坝作用在混凝土坝上的地震荷载．估计土坝 对混凝土坝稳定性的影响。文中还建议了估计这些指标的方法。 This article based on the observed phenomena in the experiment. It is suggested to use four indexes to estimate the seismic performance of concrete dam and earth dam joint. the first. Second, using the ratio of the vibration duration of the initial cracking of earth dam surface with and without joints, and the maximum seismic stress ratio of the core wall Estimating the effect of joints on earth dam seismic response: Third, earthquakes acting on concrete dams with earth dam. Estimating the effect of earth dam on the stability of concrete dams. The paper also suggests ways to estimate these indicators.