The standard "HG/T 20569-2013 Mechanical Mixing Equipment" has revised the original "HG/T 20569-1994" standard according to the requirements of the Ministry of Industry and Information Technology of the People's Republic of China and the China Petroleum and Chemical Industry Federation. The new standard has been expanded to 11 chapters, covering the material selection, assembly, safety requirements, test methods and inspection rules of mixing equipment. In addition, appendices such as Stirrer data table and vibration diagnosis have been added, the definition of terms and English corresponding words have been updated, and the typical combination type and manufacturing inspection requirements of mixing equipment have been revised. This standard aims to summarize the engineering practice experience and improve the design and use specifications of mixing equipment in combination with the latest standard requirements.