Spray forming is a rapid solidification technology.The metal melts are atomized by inert gas into droplets of 10—100 μm in size, and fly at subsonic speed onto a deposition substrate during the spray forming process. The main features of spray formed material are free from macro-segregation, the well fine grain size and uniform distribution of the strengthening phase, leading to improvement of mechanical property at acceptable costs compared to the conventional techniques. Spray forming is an inexpensive alternative to powder metallurgy (PM) for the production of High－alloyed materials, finer microstructures and better mechanical properties than conventional materials. The spray forming route is trying to manufacture superalloy turbine components in the aerospace field. FGH4095 superalloy is generally used to manufacture powder metallurgy turbine disc for high working temperature of 650℃ in aerospace industries of China. The microstructure features of spray formed FGH4095 superalloy after isothermal forging and heat treatment process are studied in thework. Spray formed FGH4095 superalloy with grain size of 8 μm was prepared by 75% engineering deformation near isothermal forging under beginning temperature 1120℃ and finish temperature 1050℃. The tensile strengths (σ_b) of isothermal forged FGH4095 superalloy at room temperature and 650℃ reach 1565 and 1552 MPa, respectively, and the yield strengths (σ_0.2) at room temperature and 650℃ reach 1231 and 1130 MPa, respectively. Meanwhile, the microstructure evolution was observed by OM, SEM and TEM. The results indicate that alloy microstructure are composed of fine recrystallization grains and larger deformed grains. Fine recrystallization grains  provide nucleation core, and then small—angle grain boundaries provide lattice distortion energy for static recrystallization. Compared with spray formed material, isothermal forged superalloy possesses fine tertiary γ′ phases dispersed in the matrix, cleaner boundary, crushed carbides, and less defects such as micropores, which has better mechanical properties.