In recent years, the tertiary industry becomes more and more vibrant. Tourism, especially inbound tourism service trade has developed to a new stage. However, the research of China inbound tourism is at its primary stage with little research on competitiveness of Tianjin inbound tourism service trade. In this thesis, inbound tourism trade in Tianjin is researched using questionnaire survey to explore its competitiveness and find out related factors affecting the competitiveness from the perspective of visitors. By using SPSS to make factor analysis, three great influencing factors, namely service infrastructure, labor and capital are found out, and the degree of their influence are figured out by factor analysis and multiple regression analysis in the hope of finding out core influencing factor in its competitiveness. Facing Bohai on the east, Tianjin has Tianjin Port, the No. 6 port in China, which has a cargo handling capacity of 0.5 trillion and becomes the sea portal of Beijing. Binhai New District and the No. 3 growth pole of China's economy. It is the core shipping area of northern part of China. Tianjin, one of the four municipalities directly under the central government, has the name of 'state-list famous historical and culture city', 'first batch of excellent tourism cities', etc.