本文总结了1985～1993年中国大气降水同位素监测网、20多个台站的稳定同位素数据，分析了我国大气降水稳定同位素分布特征，以及在各种影响因素综合作用下，大气降水的稳定同位素浓度场的时—空变化规律。求出了中国大气降水线和各区域的稳定同位素特征值。

This paper summarizes the stable isotope data of 1985 - 1993 China atmospheric precipitation isotope monitoring net with more than 20 stations. It analyzes the distribution characteristics of the atmo spheric precipitation stab1e isotope of our country and the time-space variation law of the concentration field of the atmospheric precipitation.and China atmosperic precipitation lines and the characteristic values of the stable isotope of various districts have been found out.