Core contents of the standard: First, classification and model, clarifying the classification method and model coding rules of elevator safety gears, which are divided into instantaneous safety gears and progressive safety gears according to action speed; Second, comprehensive technical requirements, stipulating the technical requirements of elevator safety gears such as structure, size, material, braking performance, safety performance, mechanical strength, and weather resistance; Third, unified test methods, unifying the test methods and test equipment requirements for various technical requirements of elevator safety gears, especially the braking performance test method; Fourth, standardized inspection rules, clarifying the items, methods and judgment rules of factory inspection, type inspection and sampling inspection of elevator safety gears; Fifth, installation and maintenance requirements, stipulating the installation, commissioning, acceptance requirements and regular calibration requirements of elevator safety gears, and clarifying the calibration cycle and scrapping standards of safety gears.