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Lightning impulse tests are conducted on distribution equipment to assess whether the insulation level meets factory standards and to identify potential insulation defects. Such tests enhance the safety and stability of distribution network operation. Firstly, in order to address the issue of complex types and diverse structures of distribution network equipment, by using portable lightning impulse generators and adopting the method of automatically generating test reports, the requirements for test sites and test procedures have been simplified. Secondly, the generation and regulation of standard lightning waveforms were analyzed, and the influencing factors were pointed out. Finally, several distribution equipment such as disconnectors were subject to on-site impulse tests in accordance with the standards, and the general process of on-site standard lightning impulse tests was summarized.