This paper describes horizontal effects of CBM (coal bed methane)fracturing, obtained from microseismic monitoring in Qinshui Basin. It indicates that adjacent wells perpendicular to man-made fractures have adverse effects, including reduced production flow rate, depletion, and watering during fracturing operation simultaneously, while wells along manmade fractures response lag. This discovery shows that the horizontal compression of fracturing could have adverse impact on production of adjacent wells, and fracturing designer should be aware of it.