Abstract: In order to solve problems that wired network is easy to be destroyed and wireless network has bad communication quality existed in current communication network in underground coal mine, a LED visible light communication system was designed. The system uses existing lighting power line as transmission medium, establishes communication network covering roadway and working face through transforming the LED lighting system, and establishing a visible light communication base station, combining with the miner's mobile nodes, so as to realize dual functions of illumination and communication. Compared with existing communication system, the visible light communication system has not natural light interference and electromagnetic interference, so it has obvious advantages over security, reliability and stability. Furthermore, for its low cost, the system has high practical value in underground coal mine.