A lot of soft soil foundation distributes in coastal areas. In recent years, the government has paid more protection to the mountain and its vegetation, thus the supply of gravel soils has reduced greatly and the price has shot up. In order to ease the contradiction between supply and demand, we need to seek a way of soft soil foundation processing for new materials. Taking the practical application of the stabilized soil from silt Xuwei Lianyungang port as an example, we carry out an analysis from aspects of technology, application effect and economy, and draw the conclusion that the sludge solidification can be used partly replacing stone, which is one of the most effective methods for soft soil treatment. It is worthy of popularizing and contributes to the construction of environment friendly and resource saving type society.