In this paper, the yield stress of cement-limestone pastes is tested by RHEOLAB QC viscometer, and the intergranular force in cement-limestone pastes is quantitatively analyzed by XDLVO theory, and the influence of intergranular forces on the yield stress of pastes was investigated. The results show:The interaction force between cement particles is the largest in cement-limestone pastes, which is about 10 times more than that between cement and limestone particles. With the increase of surface distance between particles, the van der Waals forces between particles decrease at a quadratic rate. Electrostatic and Acid-Base forces decrease at an exponential rate. The total interparticle force difference is mainly determined by the particle surface distance. When the total specific surface area of the solid increases within the range of 347~390m2·kg-1(D-F fitting degree 61.848~62.6%), the probability density f(x) or probability F(x) of the surface distance of the same particle increases, and the interparticle forces in the system show an increase in repulsive force and a decrease in yield stress.When the total specific surface area of the solid increases within the range of 390~570.986m2·kg-1(D-Ffitting degree 62.6 ~65.579%), the probability density f(x) or probability F(x) of the surface distance of the same particle decreases, and the interparticle forces in the system show an decrease in repulsive force and a increase in yield stress.