Large span steel structure high-altitude subsection hoisting support system

The utility model discloses a large span steel structure high-altitude subsection hoisting support system which comprises a temporary support frame comprising a subgrade, a main support structure connected to the subgrade, an upper part steel frame connected to the main support structure and a wind embracing rope. The main support frame is a plurality of sections of tower hoisting standard knots which are mutually connected, the wind embracing rope is arranged between the upper part of the main support structure and the ground in a connecting mode, and a lifting jack is arranged on the top of the upper part steel frame. According to the large span steel structure high-altitude subsection hoisting support system, the main support structure is formed by the tower hoisting standard knots, and thus the construction is convenient, the installation time is short and the disassembly is convenient, the construction safety is ensured and the economic benefit is remarkable. The temporary support frame is provided with the subgrade and the wind embracing rope, so that the temporary support frame is more safe and reliable.