分析了国内超声波衍射时差法（TOFD）检测能力的实验室认可现状，详细对比了国内外超声波衍射时差法相关标准中关于人员和设备的管理和技术要求，并根据超声波衍射时差法的技术特点和国内应用现状，从人员、设备、过程控制等方面，提出了关于实验室超声波衍射时差法检测能力认可的相关建议。

A brief analysis is made on the current laboratory accreditation situation for the competence of time of flight diffraction ultrasonic (TOFD) testing in China. The current standards in the field of TOFD are compared in detail for the requirements on personnel qualification and equipment calibration and checking. Based on the understanding of special aspects of TOFD and the situation of its application in China,some suggestion on personnel, equipment and control of technique for the laboratory accreditation of TOFD competence are proposed.