Abstract: The 3-D seismic surveying method is adopted in the investigation on the sinking area in the northern mining district of Yingcheng coal mine in Jiutai, Jilin Province. The basic outline and distributing scope of the sinkings are controlled. The two sinkings in the north of the surveying area are distributed on the sides of faults, covering areas of 0.06 km² and 0.025 km², respectively. The other eight sinkings are near the tunnel or old shaft, in different sizes and depths. The sinking areas are in irregular ellipse shapes, with the major axes paralleling to the tunnel. The investigation result is assessed reasonably.