The invention relates to the technical field of a high-speed railway roadbed maintenance material, in particular to a special slurry pressing material for high-speed railway roadbed rush repair reinforcement and a grouting method thereof. The special slurry pressing material is prepared from the following raw materials in percentage in mass: 40 to 90 percent of high early strength sulphoaluminate cement, 1 to 5 percent of silica micro powder, 3 to 7 percent of anhydrite, 0.01 to 0.1 percent of plastic expansion agents, 0 to 55 percent of sand, 0.2 to 0.35 percent of water reducing agents, 0.01 to 0.1 percent of hardening accelerators, 0.1 to 0.3 percent of retarders, 0.01 to 0.1 percent of stabilizing agents, 0.02 to 0.1 percent of antifoaming agents and 0.1 to 1 percent of emulsion powder. The slurry pressing material has the technical characteristics that the filling performance is good (a pipe is not plugged); the hour intensity is high; the fast construction requirements are met; the bonding with the base surface is firm; the volume stability and durability are high, and the like. The requirements of repeated impact on the roadbed during the train operation without damage can be met; the whole construction method is simple; the speed is high. By using the method, the reinforcement treatment on the existing railway roadbed can be completed in the limited time at the night skylight point of the high-speed railway operation period; the normal driving safety in a next day is not influenced; the requirement of the high-speed railway repair on the time can be met.