Abstract: The Qing court implenmented a long-term blockade policy toward the northeast China, prohibited the Minren(mainly Han people) from entering. The reality was, despite the regulation and policy restrictions, there were still a large number of Minren continue to break into the northeast area for reclamation. While developing economy in border areas, they also made a profound impact on local ethnic relations. Mainly depending on the archives from Criminal Department of Qing, take Minren Immigrator problem as focal point, this contribution intends to discuss the following five issues: the blockade policy and the Minren immigrator; the immigration of Minren and Bannerman-Minren relationship (commonly refer to Manchu and Han); Minren inflow and run off of the Banner field; the Bannerman-Minren mixed region and set up of the arbitration officer; business development and the cultural integration. Thereby, the conclusion attempt to sort out a clear clue for the change trendacy of Manchu-Han relationship of northeast in Qing dynasty.