Abstract: Evolution of the Yingkou-Weifang fault zone in Cenozoic is of great significance for us to study structure, sedimentaion, hydrocarbon generation and accumulation in east Bohai Bay basin. On the basis of the analysis from geophysics data, the author systematically studies structural styles of the Tan Lu fault zone in Cenozoic. Six strike-slip marks and four combined structural styles were identified from seismic profiles and structural maps respectively. Yingkou-Weifang segment of the Tan-Lu fault zone is known to have experienced three main stages of dextral strike slide in Cenozoic through the comprehensive analysis, and the displacement of dextral strike-slip was 10-20 km.