This standard specifies the definition of terms, performance classification, testing principle, equipment requirements, testing steps and evaluation methods for the deformation performance between floors of building curtain walls, which is applicable to the grading detection and engineering testing of the deformation performance between floors of building curtain walls. The standard describes in detail the equipment, loading methods, specimen installation requirements and other content involved in the testing process, providing a scientific basis for the deformation performance testing of building curtain walls under earthquakes and wind loads, and helping to ensure the safety and stability of building structures.