对１６根矩形截面配筋钢纤维高强混凝土纯扭构件进行了试验研究。基于复合材料力学的混合法则，提出了配筋钢纤维高强混凝土纯扭构件抗裂扭矩和极限扭矩的计算公式。应用空间软化桁架模型对配筋钢纤维高强混凝土纯扭构件进行了荷载—变形全过程分析，并提出了简化的“二阶段”分析方法。比较表明，文中提出的理论计算方法与试验结果符合较好。 Sixteen pure torsional members of steel fiber reinforced high-strength concrete with rectangular cross-sections were investigated experimentally. Based on the mixing law of composite material mechanics, the calculation formulas of anti-cracking torque and ultimate torque of pure twisted steel fiber reinforced high-strength concrete components are proposed. The entire load-deformation process of steel-fiber reinforced concrete high-strength concrete torsion members was analyzed using a space-softened truss model, and a simplified “two-stage” analysis method was proposed. The comparison shows that the theoretical calculation method proposed in the paper is in good agreement with the experimental results.