Abstract: In the development of market economy, China's demand for energy is increasing, especially for electricity energy, which is increasing year by year. A large number of power engineering projects have started construction and are invested in the power supply process to meet the needs of social and economic development and people's lives. In the operation of power equipment, substation equipment is an important component that directly affects power supply efficiency and quality. However, during the operation of crane, the safety distance warning system has a problem of low warning accuracy, resulting in damage to substation equipment and ultimately unable to ensure the safe and stable supply of electricity. Based on this situation, in order to achieve the safe operation of substation equipment, it is necessary to establish a safety distance warning system for crane and substation equipment, reasonably configure the hardware and software parts, further improve the accuracy of warning, and ensure that crane maintain a safe distance from substation equipment. This article relies on the research of the safety distance warning system for crane and substation equipment, comprehensively designs the system, and uses specific experimental analysis to judge the rationality of the warning system design, providing reference for the safety distance warning work of crane.