Three cyclodextrin metal-organic framework （CD-MOF） materials were successfully synthesized using the vapor-diffusion method. The structures were analyzed via single-crystal X-ray diffraction. As potential flame suppressants， the three CD-MOFs exhibit lower thermal decomposition temperatures （250-300 ℃） than traditional potassium nitrate （722.0 ℃）， allowing for potassium ion to release more easily. The good physical dispersibility and chemical compatibility within nitrocellulose （NC） are also demonstrated. Additionally， the NC containing CD-MOF produces fewer flammable and harmful gases （CO， NO， NO₂， and N₂O） during thermal decomposition. The single base propellant containing γ-CD-MOF shows the smallest flame area during combustion （119.6 mm²）. In comparison， the single base propellant containing β-CD-MOF exhibits the lowest standard deviation in the flame area （8.4 mm²）， indicating more consistent flame suppression performance. In contrast， the single base propellant containing KNO₃ displays the largest flame area （392.7 mm²）.