GB/T 43296-2023 specifies a test method for evaluating the room-temperature bending fatigue properties of fine ceramics in an ambient air environment, using the four-point cyclic bending method as the core approach, with the three-point cyclic bending method as an alternative reference. It is applicable to the qualification testing of bulk fine ceramic materials and the assessment of fatigue behavior under different stress levels. The standard involves applying cyclic stress, recording the number of cycles before material fracture, and plotting an S-N curve to characterize fatigue resistance. Testing requires a servo-controlled fatigue testing machine (complying with relevant metrological requirements), equipped with specialized four-point bending fixtures, stress and cycle counting systems. In some cases, acoustic emission devices or microscopic observation instruments may be used to monitor crack propagation. The standard provides a unified technical basis for the research, development, and quality control of fine ceramics.