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结合上海地区无损检测实测考核中的具体情况，分析了在混凝土浅裂缝和空洞缺陷的超声测试过程中经常遇到的一些问题，对漏判和误判原因进行了评述，并探讨了解决方法“,”Basing on the NDT examination in Shanghai, authors introduce some problems which we usually meet in the process of ultrasonic detection of such problems as shallow concrete cracks and cavities defects.The reasons of missing detection and wrong detection are analyzed in this article,and some solutions of shallow cracks are also given out in the article.