Liftable construction platform for external reinforcement of circular silo

The invention relates to a liftable construction platform for external reinforcement of a circular silo. The liftable construction platform comprises top cantilever beams, main hanging brackets, branch hanging brackets, outer-ring side wall supports, inner-ring side wall supports, walkway boards, hanging steel cables, stayed steel cables, hanging ring hooks and lifting devices; the inner ends of the top cantilever beams are provided with balance weights, the outer ends of the top cantilever beams are connected with the upper ends of the hanging steel cables, and the lower ends of the hanging steel cables are connected with the lifting devices; the inner sides of the main hanging brackets and the inner sides of the branch hanging brackets are connected through the inner-ring side wall supports, the outer sides of the main hanging brackets and the outer sides of the branch hanging brackets are connected through the outer-ring side wall supports, and the main hanging brackets and the branch hanging brackets toge