Abstract: The reservoirs of Yanchang formation of Mesozoic of Fu county and Binchang block in the south of Ordos basin are characterized by shallow burial depth and complex fracture morphology.Therefore , making clear of artificial fracture morphology is of important guiding significance for the deployment of exploration and development , as well as fracturing technology choices and fracturing design optimization. Through comprehensive research of rock mechanics parameters , the instantaneous pump pressure , reservoir heterogeneity and natural fracture , the analysis finds that when reservoir buried depth is less than 500 m , the hydraulic fracturing cracks are mainly horizontal fractures ; when the reservoir buried depth is more than 800 m , the hydraulic fracturing cracks are given priority to vertical fractures ; when the reservoir buried depth is between 500m and 800m , the horizontal and vertical fractures are likely to be formed.