The coarsening behavior of γ? precipitate phase at different temperatures and the compressive performance of novel Co-Ni-Al-W superalloy were investigated. Experiment results show that the evolution of the mean radius and volume fraction of the γ? phase obeys the classical Lifshitz-Slyozov-Wagner model. The coarsening rate of the γ? phase exhibits a significant dependence on the aging temperature, which increases from 1.30×10^-27 m³/s at 800 °C to 9.56×10^-27 m³/s at 900 °C. The activation energy of γ? phase is mainly influenced by the W diffusion in the γ matrix, presenting as 210 kJ/mol. The prepared Co-Ni-Al-W alloy possesses superb comprehensive properties, particularly the good combination of high γ? solvus temperature (1221 °C) and low density (8.7 g/cm3). Besides, the compressive yield strength of the Co-Ni-Al-W alloy at ambient and high temperatures are higher than that of other γ?-strengthened Co-based superalloys. The compressive yield strength of the Co-Ni-Al-W alloy at 850 °C is as high as 774 MPa.