采用成核晶化隔离法合成了镁铝水滑石（MgAl-LDH），并利用石灰石、砂岩和铁矿粉制备了高铁低钙硅酸盐水泥熟料（铁相质量分数为19.6%）。通过X射线衍射（XRD）、热重（TG）、扫描电镜（SEM）和化学分析法，研究了MgAl-LDH掺量对高铁低钙水泥氯离子固化能力、力学性能和微观结构的影响规律。结果表明：MgAl-LDH能显著提升高铁低钙水泥化学固化氯离子能力及力学性能；当MgAl-LDH掺量为3%（质量分数）时，与空白组相比，7 d氯离子固化率提升了46.4%，3、7、28 d抗压强度分别提高了27.5%、34.6%和17.1%。微观测试表明MgAl-LDH能促进高铁低钙水泥早期水化生成更多的水化产物，在一定程度上促进了水泥结构的致密化；并且能促进水化产物和氯离子发生反应生成Friedel′s盐，提升了高铁低钙水泥对氯离子的化学固化量。

MgAl-layered double hydroxides（MgAl-LDH） were synthesized using a separate nucleation and aging steps（SNAS） method，and high-iron low-calcium portland cement（iron phase mass fraction of 19.6%） was prepared by limestone，standstone and iron ore powder.The effects of MgAl-LDH content on the chloride curing ability，mechanical properties and microstructure of high-iron low-calcium cement were studied by X-ray diffraction（XRD），thermogravimetric（TG），scanning electron microscopy（SEM），and chemical analysis methods.The results showed that MgAl-LDH could improve the mechanical properties and chemical curing ability of chloride ions.When MgAl-LDH content was 3%（mass fraction），compared with the blank group，the chloride ion curing rate at 7 d was increased by 46.4%，and the compressive strength at 3，7 d and 28 d was increased by 27.5%，34.6% and 17.1%，respectively.The microscopic tests showed that MgAl-LDH could promote the early hydration of high-iron low-calcium cement to generate more hydration products，and promote the densification of cement structure to a certain extent.And it could promote the reaction of hydration products and chloride ions to form Friedel's salt，and improve the chemical curing amount of chloride ions.