Distributed Control System(DCS) is an important technology to building digital mine project,for it is convenient to configuration,can achieve the concentrated management of system and the dispersing of dangerous system elements.The filling of underground mined-out area is one of the important production links in metal mines.But the random disturbances acting on filling system are serious,and the models of controlled objects are difficult to be established.This article gives a case that DCS has been successfully applied in Metal Mines' filling system,and briefly introduces the control strategy based on self-adaptive adjusting rule sets for the control of filling process in metal mines.