A molecular dynamics simulation of solid tin(II) fluoride nanostructures formed in internal channels of single-walled carbon nanotubes (SWCNTs) has been performed using two types of model potentials-without and with inclusion of the polarization of ions. For the potential taking into account the polarization of ions, an ordered SnF₂@SWCNT structure is reproduced: in SWCNT(10, 10), it has the form of the SnF₂ internal nanotube. At the same time, the SnF₂@SWCNT(11,11) structure is substantially disordered (glass-like). It has been found that heating of the SnF₂@SWCNT model system produces a superionic state characterized by a high mobility of fluorine ions without migration of tin ions. The model potentials disregard the covalent character of Sn-F bonds and the specific interactions of a lone electron pair of the Sn²⁺ ion. This makes it impossible to completely reproduce the properties of SnF₂ at normal pressures. However, some characteristics of the SnF₂ high-pressure modification can be reproduced if the polarization of ions is taken into account.