Based on surface characteristics of the regional beach shallow transitional zone of Qingdong 5 area and a detailed analysis of original data, the authors adopted quadratic secondary location, cross correlation, model method amplitude regulation and prestack time migration key techniques to study and tackle such problems as drag cable drift, different epicenters and detector differences as well as ecotone amplitude energy abnormal phenomena. These technologies can effectively eliminate the inconsistency of beach neritic information in such aspects as amplitude, frequency and phase and achieve good imaging effect. The achievements obtained provide support for regional petroleum exploration.