The invention relates to a thermo-sensitive sand consolidation, channeling sealing and well completion integrated chemical system used for steam injection for thermal recovery. The chemical system is characterized in that it includes a low viscosity furfuryl alcohol prepolymer, a temperature selective curing agent, and resorcinol. The chemical system is chemically stable under oil reservoir temperature and wellbore temperature conditions. Thermal initiation after steam injection can be utilized to form high strength foam resin with cured resin as a continuous phase and gas as a dispersion phase, and a resin film is formed on a stratum sand surface. The stratum sand is cemented through a hydrogen bond, thus consolidating the stratum sand and plugging large channels. A single-fluid technique can be adopted for construction in a thermal recovery development process, and integration of sand consolidation and channeling sealing can be realized.