By means of microstructure observation and enduring properties measurement, an investigation has been made to study the influence of the molten salt cooling temperatures on microstructure and stress rupture properties of FGH95 Ni-based superalloy. The results show that, when the alloy solution treated at 1 150 ℃ is quenched in molten salt at 650 ℃ and aged, the fine γ′ phase dispersedly precipitates in the grain, and less carbide phase distributes in the alloy. With the molten salt temperature decreases, the size of fine γ′ phase decreases gradually, but the amount of the carbides increases. When the molten salt temperature is 520 ℃ the size of fine γ′ phase decreases gradually, but the amount of the carbides increases. When the molten salt temperature is 520 ℃, the size of fine phase in the alloy decreases further, and there are more carbide particles which discontinuously precipitate in the grain and along the grain boundaries. The carbide particles are dispersedly precipitated in the grain, which improves the grain strength and makes the alloy possess longer enduring life under the experimental condition. 