Abstract: In order to improve the problems of the electro-osmosis chemical grouting method, the tests need to be carried out for proper grouting concentration and methods. The electro-osmosis chemical grouting with different grouting concentrations is studied using the tubular EKG in the early period. Furthermore, the density and electricity are studied to verify the feasibility of the second treatment using the vacuum preloading combined with electro-osmosis chemical grouting. It is shown that: (1) The vacuum preloading combined with electro-osmosis can provide a new idea for grouting using the tubular EKG, and the metal corrosion can be avoided effectively. (2) The grouting results are effective. There exists an optimum concentration to make the grouting quality best. Especially, the potential should be studied to express the internal changes of soil after grouting treatment; (3) The strength can be dramatically improved after the treatment using the vacuum preloading combined with electro-osmosis chemical grouting. The grouting concentration should be chosen according to the moisture content. The further studies on the electro-osmosis chemical grouting need to be carried out and a new idea for the second treatment of vacuum preloading is proposed.