In low-voltage distribution networks, the power communication module is responsible not only for high-speed communication but also plays a crucial role in feeder identification and phase identification. The zero-crossing detection function of the module is key to achieving feeder and phase identification. The intelligent verification of zero-crossing detection circuits is a challenging aspect in power distribution technology. Traditional centralized zero-crossing detection verification systems suffer from high latency, network dependency, high costs, poor maintainability, and low data security. To address these issues, this paper proposes the design and application of a high-speed power communication module zero-crossing detection verification system tailored for edge computing. The system is designed for edge computing and consists of five layers: hardware device layer, communication interface layer, communication protocol layer, business logic layer, and application software layer. In the zero-crossing detection verification algorithm, the focus is on ensuring networking, data reading, and error calculation processes to ultimately achieve edge-parallel computing, data storage, and conclusion output. Currently, the average mean time between failures for edge computing-oriented zero-crossing detection verification systems reaches 264 hours, with an average test duration of 5.1 seconds and a verification accuracy rate of 99.96%. Compared to traditional methods, costs are reduced by 48%. The system has now been widely deployed in manufacturing factories for zero-crossing detection verification, achieving significant economic benefits and providing new insights for the application of edge computing technology in power systems.