本文着重研究江西永平三次地表爆破与福建龙海两次井下爆破所获得的大量水文地球化学效应的观测资料。确认了爆破膨胀冲击力是使氡及其它水化学组份发生变化的主导因素;爆破后引起的水文地球化学效应与各观测点所处的地质、水文地质条件以及地球化学环境有关。在此基础上对地震的水文地球化学前兆机理进行了探讨。 This paper focuses on the observation data of a large number of hydrogeochemical effects obtained by the three surface explosions in Yongping, Jiangxi Province and the two downhole explosions in Longhai, Fujian Province. It was confirmed that the impact of blasting explosion is the dominant factor that causes radon and other water chemical components to change. The hydrogeochemical effect caused by blasting is related to the geologic and hydrogeological conditions and geochemical environment of each observation point. On this basis, the mechanism of hydrogeochemical precursory earthquake is discussed.