Abstract: In this paper, vacuum preloading and electro-kinetics(electro-osmosis) role of the Pearl River Delta sea(River) of soft soil as the object of study. We conduct studies using scanning electron microscopy on the mierostrueture of the above two kinds of clay in the basic unit of the pore number and porosity, the basic unit of the average equivalent pore size and average pore size, the basic unit of the abundance and size distribution index, the basic unit of probability entropy and pore aspects. On this basis, compared the results of vacuum preloading and electro-kinetics(electro-osmosis) experiments. Experimental resuits show that, compared with the vacuum preloading and electro-osmosis test, clay after electro-kinetics trials, obvious damage of soil particles. The small pores gradually squeezed disappear or the pores of self adjustment and communicated with each other to form large pores. Soft soil by cellular space frame structure gradually into the skeleton structure agglomerate fiocculation structure, vacuum preloading and electro-kinetics of the more obvious reinforcement effect. Provide a reference for the construction of marine deposit area of Pearl River Delta region.