Based on measurement of AgNO3 colorimetric method, characteristic parameters of chloride resistance of concrete, such as chloride color change depth （Xd）, non-steady state migration coefficient （ Dnssm）, initial current（Iinitial） and 6h charge passed （ PC-6h）, were investigated. Results indicate that when Iinitinal is less than 80 mA or 6PC-6h is less than 2 000C, there is good linear correlation between Xa and PC-6h as well as Iinitial and PC-6h-Xd =0. 15Iinitinal. Through measurement of Iinitial, Xd and PC-6h can be rapidly predicted. There is not always good correlation between Dnssmm and PC-6h, and so PC-6h can＇t be used for measurement of chloride migration property in concrete.%基于硝酸银显色法测量，研究了氯离子变色深度、非稳态电迁移系数、初始电流与6h电通量等混凝土抗氯离子渗透特征参数．结果表明：当初始电流小于80mA或6h电通量小于2000C时。变色深度与6h电通量、初始电流与6h电通量均有良好的线性关系，初始电流与变色深度之间的关系为Xd=0．15Iinitinal．通过测试初始电流，可以快速测估氯离子变色深度与6h电通量．非稳态电迁移系数与6h电通量不总是存在良好的相关性，不能用电通量的值来衡量氯离子在混凝土中的迁移特性．
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