The old port of Dalian Port has been built over a century ago.The basin entrance,harbor basin and other part facilities have been formed for a long time.To adapt to the increasingly large international cruise berthing needs,the domestic and international norms are in-depth analyzed.Combined with the research results of ship navigation simulation test,the plane dimension are optimized.As a result,the best use of the existing port facilities is made,the needs of the tonnage of the largest international cruise ship berthing are met.