For high temperature reservoirs, solid particle foaming stabilizers were commonly used to improve the long-term stability of foam because they were not sensitive to temperature and salinity. Solid particles which could only be dispersed in the solution were easy to agglomerate and sink, and as a result, they could reduce the foaming effect. Consequently, it is necessary to modify the solid particles. The modified solid particles have good dispersion in water, moderate wettability, and can be adsorbed on the gas-liquid interface stably, thus improving the stability of the foam. Nano-silica particles are the most common solid particle foaming stabilizer. The amphiphilic chemically modified nano-silica in this topic was introduced by the reaction of 3-aminopropyltriethoxysilane (APTS) and vapor-phase hydrophilic nano-silica to introduce active amino groups and access the long hydrophobic chain and hydrophilic group on the surface of nano-silica through the substitution reaction. Because amphiphilic molecule was connected to the nano silicon dioxide by chemical bonds, modified nanoparticles adsorption in the bubble liquid film, through the introduction of amphiphilic molecules and foaming agent membrane molecular association, on the one hand, “with” tight liquid film, on the other hand, the “pull” boycott particles flocculated sink, granting the bubble stronger stability. The fabricated nanocomposites were comprehensively characterized including various morphological, compositional and structural characterizations with Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and foam performance test under different conditions. Results demonstrated that nanometer SiO 2 was successfully modified, and compared with that before modification, modified SiO 2 had appropriate wettability, better temperature resistance, and the half-life of liquid extract at 100 °C was improved by about 5 min. At last, the enhanced oil recovery of tree distinct foam systems was tested by core flood. The recovery rate of the modified SiO 2 foam system can be increased by 19.8%. • The chemical modification of nano silicon dioxide was carried out to construct the high temperature stable foam system. • The modified nanoparticles enhance foam stability through the association of the amphiphilic molecule and the liquid film. • The distinction from the reported surfactant modification is the reaction with the hydroxyl group on the silica surface.