The rheological curves of powder viscosity modifier admixture（VMA）combination type self compacting concrete（SCC）with different water powder ratios were determined by means of RHM 3000 ICAR rheometer. The data obtained were modeled by the Bingham model， Herschel Bulkley（H B） model and modified Bingham model respectively. The results indicate that the yield stress increases with increasing water powder ratio of the SCC with the same slump flow and air content， while the opposite is true for the plastic viscosity. The increasing water powder ratio can weaken the shear thickening behavior. When the water powder ratio increases to 0.40(by mass)， the shear thickening phenomenon completely disappears， showing a shear thinning behavior. Both H B model and modified Bingham model can describe the shear thickening behavior of SCC， and the c/μ of modified Bingham model is more sensitive to shear deformation.