KJ725(A) precise positioning system is a third-generation wireless identification system based on UWB (Ultra Wideband) technology, with a positioning accuracy of 10-30cm, which can be comprehensively applied to the precise positioning management of coal mine personnel, vehicles and equipment . UWB positioning technology uses ultra-wideband pulse signals to achieve high-precision real-time positioning, adopts TOF (Time of flight signal time of flight) algorithm of arrival time difference, and combines its high bandwidth and high waveform resolution to make it have strong anti-interference and positioning It has the characteristics of high precision and truly realizes high-precision positioning. It is currently the most accurate and large-scale application of underground positioning technology.