In the course of the optimal selection of the waterway designs, many influencing factors are involved. In order to evaluate the advantage and disadvantage of the waterway designs, the method of AHP and Fuzzy are applied to establish an AHP-Fuzzy comprehensive assessment based on the ship maneuvering simulator. The assessment for the waterway designs optimization of Tianjin port industry area is carried out. The study of the assessment model and its application may offer a new approach for the scheme selection in the waterway design.