Abstract: It has been difficult to approach an accurate and quantitative characterization of the evolution of tectonic fracture attitudes. By defining the mechanical properties of fracture and the mechanics parameters of rocks, and on the basis of restoration of the paleo-tectonic morphology, an optimal failure criterion has been selected after the numerical simulation of paleo-stress field during the fracturing, to predict the occurrence and distribution of fractures. This brings forward a new idea to predict paleo-fracture occurrence by paleo-fracture stress field and the fracture was reconstructed by the late tectonic activity. That is, through the three-dimensional spatial variation rule of rock strata of early and late stage a theoretical fracture transformation space model was established, which is corresponding to different tectonic active period. By utilizing the mathematical derivation of the algorithm and quantitative analysis of evolution of fracture, the prediction accuracy of the fracture occurrence is improved. In the end, the Fu-2 Member reservoir in the eastern flank of Tongcheng fault zone is taken as an example for the quantitative prediction of attitudes evolution of structural fracture. Combined with tectonic evolution, the tectonic fracture evolution can be divided into three stages:the Late Funing movement and formation of fracture, the Dainan movement and fracture development, the Sanduo movement and fracture separation.

Key words: tectonic fractures, attitudes, evolution, quantitative prediction, rock mechanical layers, application, Tongcheng fault zone