Abstract: It is important significance to identify mine water-inrush source for the mine water control. The source of water-inrush comes from different aquifers rather than the same aquifer many times. This paper proposes a model based on the principle of hydrochemistry that there are differences in hydrochemical characteristics between different aquifers to identify the source of mixed water-inrush. Taking Jinggezhuang mine in Kailuan as an example, judge the source of the water sample to be identified by drawing Piper's three-line diagram. Establishing the mixed model of mine water source which took six conventional ions and the pH value as identification factors by using the software PHREEQC , and proposed a model for judging the water source of the mixed water-inrush which was according to the calculation result of Euclidean distance. The results show that Piper three-line diagram combined with Euclidean distance is an accurate and feasible model to identify the source of mixed water-inrush.