GB/T 2423.62-2018 "Environmental testing - Part 2: Test methods, test Fx and guidelines: Multiple input multiple output vibration" standard specifies the method of multiple input multiple output (MIMO) vibration testing. The standard defines the terms, equipment, methods and conditions of MIMO testing, providing detailed requirements for test implementation and result analysis. MIMO testing is mainly used to identify and verify mechanical weaknesses and performance changes of samples under multi-exciter excitation, ensuring the integrity of mechanical structure and function. The standard also introduces concepts such as multi-excitation uniaxial (MESA) and multi-excitation multiaxial (MEMA), supporting the study of complex dynamic characteristics.