α卡测量法是短期累积测量氡、钍射气浓度的新型核测量方法。应用此法寻找基岩地下水源,具有灵敏度高、探测深度大、干扰因素少、工作周期短等特点。本文介绍这种方法在山东省平阴县灰岩地区找水应用时获得的良好效果,并就其方法原理和应用基础进行简略的探讨。 Alpha card measurement method is a short-term cumulative measurement of radon, thoron gas concentration of new nuclear measurement methods. The application of this method to find bedrock groundwater source has the characteristics of high sensitivity, large detection depth, less interference factor and short working cycle. This article describes the good results obtained when this method is applied to find water in the limestone area of ​​Pingyin County, Shandong Province, and briefly discusses its method principle and application foundation.