Marine sedimentary soil(MSS) is widely present in coastal engineering such as ports,which is easy to be disturbed,poor in engineering characteristics and difficult to accurately characterize the mechanical parameters.Based on the geological survey data of Yantian Port,the correlation between the standard penetration response characteristics and soil property parameters of MSS is studied,and an intelligent interpretation method of mechanical parameters based on the standard penetration response is constructed by using a fully connected feedforward neural network.The results show that the standard penetration response of MSS in Yantian Port is significantly affected by the physical and mechanical properties of soil,and the relationship between the two is difficult to be characterized by the existing empirical formulas.However,the intelligent interpretation model constructed in this paper can well reflect the nonlinear relationship between the standard penetration number and various factors,and can obtain the predicted value of the mechanical parameters with high accuracy.The research results can provide reference and guidance for the evaluation of mechanical parameters of MSS in port construction.