Abstract:when use filling method for deep mining ,,if the use of the traditional filling system, may meet a long filling line, filling pipe laying complex, their transportation, filling and low concentration, before filling water and filling the guide after water wash tube is more a series of problems, such as mobile filling system of underground and appeared to solve these problems to provide a very good idea. Practice has proved, underground mobile filling system has a mobile flexible, high pressure pump, the fill density high, high efficiency, low cost, simple pipe laying, etc.