This paper takes the soft soil in Zhongshan port area as the research object. Many physical and mechanical indexes obtained from the spot

laboratory test and in-situ test have been analyzed. The results

which are compared with the soft soil from Nansha and Pearl River Delta

indicate that the variation of the water content

void ratio

compressibility in here are lower than these in other places. But its mechanical characteristics are still poor because of its low bearing capacity. In order to understand the relationship between the indexes

the linear and nonlinear regression equations are established. This research shows that the correlations of void ratio

moisture content and dry density in this area are the best. By analyzing the water content

void ratio

compression coefficient and cohesive force in different places in Zhongshan port area to describe the longitudinal variation curve

the curve shows that the soil indicators of the longitudinal change rule have regional differences. The results can be used for reference in the engineering construction in this area.