The rheological curves showing the properties of alkali-activated carbonatite-slag grouting material (AACSGM) pastes with different formulae and different testing times by the R/S-SST rheological meter. The effect of preparation parameters, including modulus and concentration of sodium silicate solution, content of slag and BS addition, on the rheological property of the pastes was discussed in this paper. The results show that AACSGM pastes belong to Binham fluid. The yield value and plastic viscosity of the pastes increase with the increases of slag addition and concentration of sodium silicate solution and with the decrease of its modulus. The rheological property of the pastes is improved evidently with BS addition.