The environmental isotopic technique is one of the new and effective ways to research the groundwater recharge at home and abroad.The paper analysed and calculated the 18O and D of 93 water samples from study area.The results showed that the recharge source to the karst water(including mine water),in mining area is atmospheric precipitation in mountainous area,and the karsr water in 1st mine of Pingyu come from the sidewise runoff at north and northwest the direct recharge source is the groundwater at Baish...