Abstract: Taking the Tianjin area as an example, this paper established evaluation method system of seismic hazard suitable for large area through the analysis and processing of the basic data such as fault tectonics and earthquakes. This method determine the weight of the evaluation factors in the evaluation index system by the AHP, and quantitatively evaluate the risk zone of the study area by the two-level fuzzy comprehensive evaluation method, and finally obtain evaluation risk assessment results of Tianjin area according to the principle of maximum membership. The results show that the extremely high risk areas are basically distributed in Tanggu, Gegutown of Jinnan District, Ninghe District and near the Jiyunhe fault; High-risk areas are mainly distributed in some parts of Tianjin urban area, Sangzitown of Jizhou district and the surrounding area of extremely high danger area. The eastern part of Jizhou District and Youguzhuang-Houjiaying area, Wuqing District, Beichen District, southwest of Xiqing District, the north and west areaof Jinghai District, Dagang District and Hexi-Nankai urban area are low risk or very low risk area; Other areas are moderately dangerous.