Abstract: Due to the low density, large viscosity and poor liquidity, foamed concrete needs to be leveled. Foamed concretes with A03~A05 and various rheological properties were prepared by changing w/c and dosages of admixtures, the effects of w/c and admixtures on the flowability and rheological parameters were studied. The results showed that the relative yield stress decreasing with the increasing w/c, decreasing relative yield stress and relative viscosity can be achieved by increasing water reducer and decreasing set-accelerator. Increasing w/c and adding water reducer are beneficial to improve the fluidity of foamed concrete. Self-flowing foamed concrete can be achieved.