To realize the breakthrough on underground coal mine rescue technology, studied one based on RFID personnel orientation rescuing system. The system is composed of transmitter and receiver. The miner carries a transmitter, once accident happens, the succor use the receiver to communicate with the transmitter at UHF band, and judging the direction where the miner is by observing the received signal level. The radio module adopts super heterodyne structure with built-in LNA, digital filter, matching network, RSSI and DDS+ PLL frequency synthetic technique. The system use 433 MHz working frequency outstanding penetrability, high diffraction performance and long identification distance. It realized sixty meters communication in the tunnel, and penetrate five meters coal, and identify fifteen cards per second with a high anti-interference performance, which becomes a important complement of the coal mine rescuing means.