Ground fissures are extensively developed in Longyao area,and cause serious geohazard.Based on previous ground fissure investigation which has lasted for many years in the North China Plain and aimed at analyzing the structure of the existing ground fissures and revealing the factors controlling the development of ground fissures,the authors employed geophysical technologies to conduct ground fissure survey in Dongdianma Village where the ground fissures are exposed. The vibraseis method,α-cup cumulative radon detection method,geological radar method and multi-channel transient Rayleigh wave method were utilized to perform the investigation,and the good exploration results show that the first three geophysical methods have the optimal response characteristics and hence are the key technologies to investigate Longyao ground fissures.The integrated geophysical method based on these key technologies provides not only conclusive geophysical data but also scientific basis for the mechanism of Longyao ground fissures.