Abstract: In this paper the airbone-magnetic data of Heze earthquake region is processed and the distribution of apparent specific magnetic moment,the buried depth of basement magnetic interface and the buried depth of Curie isotherm surface in this region are calculated using atrbonemagnetic data and inversion theory for 3D magnetic straitum. The results show that the depth of basement magnetic interface in Dongpu Depression is 12km deep, the lower Curie isotherm surface uplifts and the depression interior is filled by weak magnetic mass. Earthquakes occured on the mutation zones of apparent specific magnetic moment, the basement mgnetic interface and Curie isotherm surface around the Depression.