Abstract: In order to investigate the modification effects of organic magadiite on nylon 6(PA6), firstly, the organic magadiite (Org-Maga) was formed from magadiite (Maga), which was intercalated by the hexadecyl triphenyl phosphonium bromide selected as the intercalation agent through ion-exchange method. Org-Maga/PA6 composites were prepared through melt intercalation method. The structure and morphologies of the materials were characterized by XRD, SEM and TEM. Mechanical properties and crystallization property of the composites were investigated by mechanical property tests and DSC. The results show that the intercalation agent can intercalate the space of the Maga, the basal spacing of the Maga is increased from 1.53 nm to 2.90 nm, and there are intercalated and exfoliated structures in nano Org-Maga/PA6 composites. The addition of Org-Maga can improve mechanical properties of PA6 obviously, which reach the optimal value when the mass fraction of Org-Maga is 3wt%. The phenomenon of "Melting recrystallization" (unstable polymer crystals (γ phases) recrystallized to form α phases) is formed during the melting process of the composite, and the crystallization temperature of PA6 will raise with the addition of magadiite.