Abstract: In order to study the variation laws of stress and displacement during bedding drilling construction, the FLAC^3D numerical model is set up. According to the numerical simulation results and drilling ambient stress distribution theory, the variation law of stress and displacement is analyzed. And the industrial test of drilling peep is constructed in eighth coal mine of Pingdingshan Coal Mine Group. Results shows that during the bedding drilling construction, the coal stress possesses following 4 states in turn of origin, peak, drop, remains, and the increasing speed of displacement turned from small to big and small. After drilling, there are pressure relief area, stress concentration area and original stress area around drilling. The closer to the drilling centerline, the bigger displacement it is, at the same time, the displacement of upper coal is bigger than the lower one.