Single-phase dual-emitting CdTe@NaNO3 composite was prepared by a facile and efficient aqueous ethanol phase assisted coprecipitation method, providing a new type of solid-state luminescent material with processability, robustness and high luminescence. Cubic-shape Green + Red (G + R) CdTe@NaNO3 composite particles display single-excitation, dual-emission with two well-resolved, intensity-comparable fluorescence peaks. Its application potential in ratiometric luminescent thermometry was tested, by exploiting the temperature-dependence of fluorescence intensity ratio (green/red) in range of 273-473 K, and the maximum sensitivity is found to be 0.6183% K-1 at 473 K. The results indicate that dual-emitting G + R CdTe@NaNO3 composite could be considered as potential candidates for ratiometric temperature sensing.