Core tube inner tank upper formwork system hard protection device and construction method thereof

The invention discloses a core tube inner tank upper formwork system hard protection device and a construction method. The core tube inner tank upper formwork system comprises a core tube inner tank, the core tube inner tank is provided with a formwork construction embedding device, a steel corbel is fixed to the formwork construction embedding device and is provided with a hoist, a hoisting steel wire rope is arranged on the hoist, a hard protection construction platform is connected to the lower end of the hoisting steel wire rope, an operation scaffold is erected on the hard protection construction platform, the steel corbel is fixed through the formwork construction embedding device used when the core tube inner tank upper formwork system is used for constructed, and the hard protection construction platform is fixed to the steel corbel; when a core tube wall is firstly constructed, the hard protection construction platform can be driven by the hoist to automatically ascend along with the core tube floor operation face at the lower portion, safety construction of the creeping formwork bottom operation face is guaranteed, and the working efficiency is improved.