Abstract: When the GB/T 10561 standard was revised, the definition of DS inclusions, the calculation formula of inclusions and the rating diagram of inclusions were mainly modified, and the standard terminology, the sampling diagram of steel pipes, the evaluation method and the representation of chemical characteristics of composite inclusions and precipitated phases, the two results of B method were added. The revised content of GB / T 10561 was introduced in detail from the aspects of standard terminology, principle, sampling and detection method, so as to help inspectors better implement the new standard and improve the accuracy of non-metallic inclusion rating.