Abstract: Most coal mines in Ordos Basin are mainly Jurassic coal seams. The mining conditions are characterized by large mining height and depth. The roof aquifer is numerous and poses a serious threat to mine safety. It is particularly important to study the height of the water-conducting fracture zone of the roof over Jurassic coal seam. Taking a mine in Ordos Basin as an example, through theoretical calculation, numerical simulation, and similar analogy methods, the development height and fracture-mining ratio of the water conducting fracture zone on the roof of the goaf are predicted and analyzed. The results show that the fracture-mining ratio is 22.07 and the development height of the water-conducting fracture zone is about 154.48 m. The fitting formula obtained by analogy predicts that the height of the water-conducting fracture zone of the mine is close to the theoretical calculation value.