Abstract: Drip water samples for 15 months were collected from the Kaiyuan Cave, Zibo City of Shandong Province, a cave located in a semi-humid monsoon climatic zone in coastal North China. Geochemical information suggests that: (1) the variations in dripping rates respond rapidly to the atmospheric precipitation outside the cave. (2) Although the Ca²⁺, Mg²⁺, Sr²⁺ and Ba²⁺ concentrations display significant seasonal variations, their behaviors and influencing mechanisms are rather different. (3) The Sr/Ca and Ba/Ca ratios of the drip water may respond to certain degree to the atmospheric precipitation outside of the cave, and, especially, the Mg/Ca, Sr/Ca and Mg/Sr ratios may well indicate heavy rainfall. However, the variations in Mg/Sr in the drip water do not respond obviously to surface air temperature.