钠基膨润土防水毯(以下简称GCL)作为传统压实黏土层的替代者，具有优异的防渗隔离性能，被广泛应用于水利、环保、交通等领域的防水防渗工程。GCL在国内应用已有20多年，但人们对其认识还存在一定的误区，阻碍了GCL的进一步推广应用。为消除人们对GCL的错误认识，加深对GCL的理解，基于多年的GCL生产和研究经验，阐述了编织布平整度、膨润土特性、GCL认知、测试方法等方面存在的问题。研究结果表明:不平整载布不宜用于GCL的生产;以GCL为主防渗层的工程，应该使用粉末型GCL;GCL作为环保工程的次防渗层，是整个防渗系统的重要组成部分;GCL检测标准应增加平整度或漏点检测，并应能反映GCL前期渗透系数。

As an alternative of traditional compacted clay layer,sodium bentonite geosynthetic clay liner(hereinafter referred to as GCL) has excellent performance of anti-seepage and isolation, hence has been widely used in the anti-seepage engineering of water conservancy, environmental protection, transportation and other fields. GCL has been applied in China for over two decades, but misunderstandings about GCL still exist, which hinders the further application of GCL. In this article, problems of GCL, inclusive of the flatness of geo-woven, the performance of bentonite, the cognition and the testing methods, are expounded according to our experiences in GCL production and research for over a decade. Results suggest that uneven geo-woven is not available for producing GCL; powdered GCL should be selected for project with GCL as a main impermeable layer; although as a secondary barrier layer in environmental projects, GCL is an important part of the whole anti-seepage system; detection of flatness and leakage should be included and also the early hydraulic conductivity of GCL should be reflected in the testing standards of GCL.