Abstract: With the increasing frequency of rocket launches, the demand for all-weather launch capabilities is on the rise. To evaluate the adaptability of the equipment to thunderstorm conditions, pin injection tests were conducted on typical electronic equipment utilized in rocket propulsion systems. These tests confirmed the susceptibility of the devices to lightning indirect effects. The tests identified lightning sensitivity in interfaces associated with integrated circuits or precision instruments, necessitating lightning protection measures. Detailed descriptions of lightning protection circuit design methodologies for floating ground and shell connection circuits were provided. Additionally, parameters for selecting transient voltage suppressor (TVS) were proposed. Test verification confirmed that the designed lightning protection circuit effectively mitigates lightning indirect effects to an acceptable level, thereby safeguarding the electronic equipment. This research contributes to the advancement of comprehensive lightning protection technology for rockets, thereby enhancing the reliability and safety of all-weather rocket launches.