Abstract: A large-scale specified equipment for vacuum baking and degassing is developed for a large complex component in an aerospace model, with an effective volume size of ϕ3100 mm×5500 mm, and an ultimate vacuum degree better than 2×10^-4 Pa; and the maximum heating temperature of no lower than 150 ℃. According to the data from 113 temperature measurement points evenly distributed on the surface of the component during the vacuum baking and degassing operation, the temperature difference on the component surface is only 3.0 ℃, with a temperature fluctuation of less than 3.0 ℃ within 24 h. Theoretical analysis finds that the heating scheme of the armored heating wire is effective for the development of such kind of equipment; the additional secondary radiation screen can be used to reduce the temperature fluctuation on the component surface; the adjustable power heating scheme can well stabilize the temperature control performance and can avoid possible temperature overshoot, as is inevitable in the PID temperature control scheme.