JJF 2053-2023 "Clean Bench performance parameter calibrating specification" is applicable to the calibrating work of Clean Bench performance parameters. This specification refers to a number of relevant standards, including performance requirements for high-efficiency air filters, classification standards for clean rooms and Clean Bench, and technical requirements for medical Clean Bench. The terminology section defines key terms and definitions such as Clean Bench, Vertical Unidirectional Flow Clean Bench, Horizontal Unidirectional Flow Clean Bench, and High-efficiency Air Filter. Clean Bench is mainly used for various precision operations and experiments as a device that provides a local clean environment above ISO5 (Class 100). This specification ensures that the Clean Bench can provide the specified cleanliness and air flow characteristics stably and accurately during use, ensuring its Reliability and effectiveness in laboratory and medical environments.