The change of salinity field in the estuary area will not only affect the settlement and consolidation characteristics of the sediment, but also affect the salinity of the pore fluid between the sediment particles and change the salt content of the sediment. It further affects the engineering properties of the sediment. In order to study the influence of salinity change on the engineering properties of sediments, the field observation of the Yellow River Estuary and laboratory experiments were carried out to determine the range of salinity field and simulate the consolidation process of sediments in different salinity. At the same time, the physical and mechanical properties were measured to establish the relationship between salinity and the sediments engineering properties. The results show that both the salinity field and the salt content in the Yellow River Estuary are non-uniformly distributed in the horizontal direction. The low salinity area is limited to estuary, and the sediment salt content of the whole sea area varies from 0.5‰ to 4.6‰. There is a good correlation between engineering properties of sediments and salinity. Mainly show that the water content, liquid limit, void ratio and compressibility coefficient of sediments decrease with the salinity increase, while salt content, bulk density, shear strength and penetration resistance increase along with the increasing salinity. And as the consolidation process progresses, the promoting effect of salinity on shear strength and penetration resistance decreases.