Abstract: With the castable rheometer,L-box flowability test apparatus and self-flow test apparatus,the influence of water addition,dispersant content (FS10),aluminate cement content and α-Al₂O₃ content on the rheology and flowability of a corundum-based self-flow castable were researched,and the relationship between rheological properties and flowability of the castable were analyzed.The results show that with the increase of water addition (4.9% to 5.3%,mass fraction),the relative yield stress,relative plastic viscosity and relative average viscosity decrease,but the self-flow value and flow velocity increase.With the increase of dispersant FS10 (0.16% to 0.20%,mass fraction),the relative yield stress,relative plastic viscosity and relative average viscosity decrease,but the self-flow value and flow velocity increase.With more dispersant FS10 additions (0.20% to 0.22%),the relative yield stress,relative plastic viscosity and relative average viscosity increase markedly,but the self-flow value and self-flow velocity decrease remarkably.With the increase of aluminate cement (1% to 4%,mass fraction),the rheology and flowability parameters have some change,but not obvious.With the increase of α-Al₂O₃ addition (9% to 12%,mass fraction),the relative yield stress and relative average viscosity decrease,the relative plastic viscosity and self-flow value have little change,but the self-flow velocity increase.The relationship between rheology parameters and flowability parameters of the corundum-based self-flow castable is shown as the following:the self flow value and relative yield stress have good relevance;the flow velocity and relative average viscosity have good relevance.