By taking the anti-seepage project of Ningxia Gunzhongkou Reservoir as an example , the in-site test , con-struction process and quality control method of cutoff wall formed by multi-head and small-diameter deep mixing pile are introduced .The results of field detection indicate that this technique has a good effect in wall formation and is a simple construction method with low cost , which is worthy of promotion .% 以宁夏滚钟口水库防渗工程为例，介绍了多头小直径搅拌桩防渗墙施工的现场成桩试验、施工过程及质量控制方法。现场检验结果表明：多头小直径搅拌桩防渗墙施工技术，成墙效果好，且施工简便，成本低廉，值得推广。
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