During the late Qing Dynasty, Tianjin Customs gradually established the seaport quarantine system to prevent the spread of epidemics from Japan, Hong Kong, and the Northeast. The major infectious diseases inspected by the quarantine institution of Tianjin Port include cholera, plague, smallpox, typhus and yellow fever, of which cholera is the most frequent and influential infectious disease in modern Tianjin, followed by plague and smallpox, and no large-scale epidemics of typhus and yellow fever have been found.In the process of preventing the spreading of foreign infectious diseases, the quarantine institution of Tianjin Port has gradually developing. A set of business system has been established, which is based on ship inspection and takes preventive injection, rat flea research and disease diagnosis and treatment as the core.In conclusion,the seaport quarantine institutions in Tianjin played an active role in the prevention, detection, and response to major infectious diseases ,opened up a precedent for Chinese people to independently handle border health quarantine.Its historical practice and quarantine mode are a window for understanding the development history of quarantine infectious diseases in modern China, which has very important reference value.