污染防渗、封闭隔离污染源是目前地下环境治理及预防的重要环节。本文提出了地下纯粘土连续墙的防渗材料及成熟的施工工艺，包括地下环境条件、粘土墙的设计、材料的选择与处理、施工工艺及程序、墙体性能和防渗效果、该技术的适用范围等问题的论述。该方法操作简便、成本低廉、效果可靠。 Pollution impervious, closed source of pollution isolation is an important part of the underground environment management and prevention. In this paper, the impermeable materials and mature construction technology of underground pure clay continuous wall are proposed, including the underground environmental conditions, the design of clay walls, the selection and treatment of materials, construction technology and procedures, wall performance and seepage control effect. The scope of application and other issues of discussion. The method is simple, low cost and reliable.