The precipitation behavior and dissolution behavior of η-phase of 718Plus alloy are studied. By the thermal compression with different compression amount, the effect of different quantities of η-phase on the recrystallization was studied. Recrystallization behaviors of samples with little η-phase compressed at different conditions were studied. The results show that, the peak temperature of η-phase precipitation occurred at 900℃. The dissolve behavior of η-phase was mainly effected by solution time, and it dissolve effectively after 2 hours at temperature of 1040℃. Small quantity of η-phase contributes to dynamic recrystallization in large deformation process while large quantity of η-phase restrain dynamic recrystallization. At appropriate deformation temperature and rate, small quantity of η-phase interacted with the dynamic recrystallization process, which makes for the uniform fine crystal structure.