With a one year indoor silt loam column simulation experiment, regularity of evaporation of groundwater under different groundwater conditions was studied, and so was the relationship between soil electric conductivity (of 0~40cm layer) and total amount of evaporation.The results showed that even under different groundwater conditions total amount of evaporation was in linear relationship with duration of the experiment, that the lower the mineralization of the groundwater was, the more sensitively related the cumulat ive amount of evaporation was to variation of the mineralization of the groundwater, and that the deeper the groundwater table was, the more sensitively related the cumulative amount of evaporation was to variation of the depth of groundwater table.The relationship of total amount of evaporat ion with groundwater table as well as groundwater salinity was thus set up.After mineralized groundwater influenced 0~40cm layer soil, soil electric conductivity there was logarithmic to total amount of evaporation when the groundwater table was at 85cm or 105cm, but exponential when the groundwater table was at 155cm.