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通过系统研究渤南洼陷中、新生代的构造形变和应力场，分析了洼陷的形成和演化过程。研究结果表明：渤南洼陷构造主要经历了印支期的逆冲造山运动、燕山期的负反转构造运动、喜马拉雅期的断陷阶段和坳陷阶段。渤南洼陷构造演化的阶段特征表明了洼陷的应力场自中生代以来经历了印支期的右旋剪切、燕山期的左旋剪切、燕山末期的左旋剪切到右旋剪切的转换期、古新世—渐新世右旋剪切、中新世—全新世弱右旋压剪，为古应力场的研究解决定时、定向问题，同时也为古应力场数值反演（定量）提供古构造模型和边界条件，其结果的准确性可以得到有效的保障。“,”According to the systematical research of the Meso-Cenozoic rock deformations and stress fields of the Bonan Sag,the present paper analyzes the formation and evolution of the Bonan Sag.The study results show that the Bonan Sag experienced the thrust orogenic phase in Indosinian epoch、the negative inversion phase in Yanshan epoch、the faulting episode and depressing episode in Himalayan epoch.The evolution of major faults in the Bonan Sag could be used to interpret the stress fields history of the Bonan Sag in the Meso-Cenozoic:dextral shear during Indosinian epoch、sinistral shear in Yanshan epoch、transition period from sinistral shear to dextral shear at the end of Yanshan epoch、dextral shear from the Paleocene to the Oligocene,and weak dextral transpression from the Miocene to the Holocene,and it was elaborated how to solve timing and orientation in paleotress field study,it also provided paleo-structure model and constraint condition in paleostress field backward computation(quantity),and their results were highly consistent.