Form-stable phase change materials are widely applied in the fields of energy, aerospace, and microelectronics due to their excellent leakage prevention and enhanced safety. This study focuses on the micro- and nanoscale interfacial heat transfer regulation mechanism of SiO₂/Na₂SO₄·10H₂O composites during thermal energy storage. Using molecular dynamics simulations, the effect of temperature on the interfacial thermal conductivity between α/β-SiO₂ and Na₂SO₄·10H₂O was investigated. The results show that the interfacial thermal conductivity of both systems decreases significantly as the temperature increases: for the α-SiO₂/Na₂SO₄·10H₂O system, the interfacial thermal conductivity drops from 150.81 MW·m^-2·K^-1 at 286.15 K to 93.04 MW·m^-2·K^-1 at 326.15 K, with a reduction of 62.09%; while in the β-SiO₂ system, it decreases from 120.05 MW·m^-2·K^-1 to 91.90 MW·m^-2·K^-1, corresponding to a reduction of 30.63%. At low temperature, the interfacial thermal conductivity of α-SiO₂ is 25.62% higher than that of βtype, but the difference decreases to only 1.24% at 326.15 K, indicating that the regulatory effect of lattice symmetry on heat transport is more pronounced in low-temperature thermal energy storage. These findings provide theoretical insights into the interfacial heat transfer mechanisms of form-stable phase change materials and offer guidance for their application in the field of thermal energy storage.