Indoor tests on grouting materials were carried out through controlled compaction grouting technique. Type of the slurry was firstly determined in line with the requirements of grouting process, upon which the test raw materials were selected. Then, the influence of each factor on the performance of the slurry were investigated before obtaining the appropriate range of each component of the slurry. Finally, through orthogonal test, an optimum formula for the controlled compaction grouting was obtained as follows: water-cement ratio is 0.6; cement accounts for 88% of the solid, and bentonite accounts for 12% of the solid; superplasticizer accounts for 0.5% of the cement, and water glass accounts for 4% of the cement. 