本文根据注水煤层湿润过程，采用非饱和一饱和二维非稳定渗流理论给出了利用计算机模拟煤层注水湿润分布状态方法。通过实例说明，这种方法方便、可靠，是分析注水煤层湿润分布状态及优化煤层注水参数较为理想的科学手段。 In this paper, according to the wetting process of waterflooding coal seam, the method of simulating the wetting distribution of coalbed waterflooding is given by using the unsaturated and saturated two-dimensional unsteady seepage theory. The example shows that this method is convenient and reliable, and it is an ideal scientific method to analyze the wet distribution of waterflooding coal seam and optimize the injection parameters of coal seam.