Tianjin Customs is 1861 March 23, set up in the Qing Dynasty after the second Opium War open Tianjin port and disposal between Qing Dynasty and Korea modern barter and negotiation affairs agency. Since the 1980s, the relationship between the Tianjin Customs and North Korea becomes double close, because this time the authorities will have by rites governance relationship with North Korea in the frontier and social affairs over to Li Hongzhang, by Li Hongzhang's minions by Tianjin Customs reality as representations of the results. Is, served in the Tianjin customs Zhou Fu involved in the formulation of commercial draft articles of association between the two countries in September 1882. After the signing of the articles of association, follow the Korean commanded kill hand "Tianjin in Zagreb Zadok and frontier affairs" that in Tianjin University and Tianjin Customs Road between by process of modern letters of negotiation results in exchange for the cessation of, in the Qing Dynasty and Korea gradually establish modern frontier trade relations. This article attempts through the historical evolution process of Tianjin Customs, the signing of the articles of association of the frontier, permanent envoy commanded hand pass, passport issue, hire between nationals and loan performance these research in the Qing Dynasty and Korea business travel case and two double relations remind two section system style of the significance of the era. This paper is composed of three departments, the introduction and conclusion form. The first chapter is the introduction. Discusses the goal and significance of the topic, the relevant research situation and research thoughts and methods. This theory is composed of second chapters and third chapters, fourth chapters. The second chapter, the customs of Tianjin and North Korea in Tianjin University. Through the process of elaboration between Qing Dynasty and Korea sign of the articles of association of the frontier and modern permanent control degree and in fact made not observations of the Qing Dynasty and North Korea received new communicative process. The differences between previous letters convey system set up in the Qing Dynasty and korea. At the same time between Tianjin Customs officials and members of the North Korean ambassador to Jin Nianye on communication coherent modern cases receiving note and correspondence, such as letters, and maintained close contact. The third chapter, management method of business dealings between China and the dprk. The Department is the focus of the full text, from the following several aspects to stop discussing, namely: send leads, tickets and licenses issued, passport issued. With as North Korea sent to Tianjin Ji played officer Huoji consulting, a line and Qing Dynasty issued to all the tickets, between the two countries business folk contacts licensure and, exchange and officials of the two countries, bilateral business folk in frontier traveled, the road to China to Korea, and other countries of foreign nationals in China passport issued to the situation, analysis of the relations between China and the DPRK business at the time. The fourth chapter, hire domestic and loan performance. The Qing authorities to North Korea proposed appointment of Oriental people to assist in the disposal of the relevant matters concerned North Korea customs stop negotiations. Because North Korea Tianjin first curtilage construction, under the Qing Dynasty ruling fresh without collateral or Liqian, consciously to borrow money from a North Korean supply, between the modern country of financial transactions is applied in between Qing Dynasty and Korea traditional tributary system style relationship. At the same time, Tianjin customs in modern Sino Korean relations in the role. The fifth chapter is conclusion. It is important for the comprehensive summary of the former chapters.