Combined type lower support tool of tower crane

The utility model relates to a combined type lower support tool of a tower crane, and belongs to the technical field of tower cranes. Comprising a tool platform, a lower support positioning lug and a quick locking pin, a plurality of groups of positioning holes are formed in the tool platform, the lower support positioning lug is fixed on the positioning holes of the tool platform through the quick locking pin, and the lower support positioning lug is used for positioning a lower support main chord member of a product. The utility model has the beneficial effects that: the tool cost is low: a plurality of products share the platform, and the production cost of the platform and the lug seat is reduced through a mode of module combination; the tool design and debugging period is short, the combination modes of various sizes and structural forms are considered at the beginning of the design, the sizes and lug forms can be rapidly switched to achieve switching of product tools, size combinations of more forms can