Chem. machinery and equipment is the key to the development of chem. enterprises, and it affects the production value and efficiency of chem. enterprises.With the continuous innovation of technol., the safety of many chem. machinery and equipment has been significantly improved.Based on the safety characteristics and fault diagnosis anal. of Huangong machinery and equipment, this paper focuses on the influence of safety characteristics of chem. machinery and equipment, explores the principle of failure of chem. machinery and equipment and the diagnosis content of chem. equipment, and strives to optimize the management measures of chem. machinery and equipment and reduce the failure frequency of chem. machinery and equipment.