Ports and terminals in the Middle East are generally built by hydraulic fill. Due to the limitation of construction technology，fine grains are easy to form siltation in hydraulic reclamation，which results in excessive settlement. The current design calculation methods do not consider the fine-grain content，mineral type，and other factors in the calculation of post-construction settlement of sandy soil with a high content of fine grains. Thus，it is difficult to evaluate the influence of the fine-grain content on post-construction settlement. To solve this engineering problem，this study proposes a calculation method for the long-term settlement of hydraulic-fill sandy soil based on creep characteristics and compares it with traditional and in-situ test methods to verify the feasibility of the proposed method.