Abstract: Yutianbao coal mine is one of those mines mostly influenced by water catastrophes in the south of China. Based on the water inflow ledger of different levels over seven years before mine closure，through the analysis of water inflow change curve in different sections, water inflow mutation point and water inflow proportion change in different sections, combined with mining activities, we draw the following conclusions: ①different levels of roof separation and water storage space has better connectivity, when lower level becomes the main inflow way, upper level inflow synchronically decreases; ②When new exploitation approaches the new Shimen and forms a new channel, original Shimen water inflow greatly decreases at first and then gradually stabilizes. Roof separation cracks gradually become smaller, water inflow decreases slowly; ③Uppermost level one is directly supplied by rainfall infiltration, lowermost level three is significantly affected by rainfall and its recharge sources are rainfall and all types of groundwater supplied by rainfall. Mining area west Shimen four water inflow accounts for 66.45% of the entire mine water inflow. The study on characteristics of water inflow in different levels and different Shimen provides information for understanding of groundwater migration laws and water prevention and control in mining area.