Expansion type post-cast strip suitable for overground high-rise building

The invention provides an expansion type post-cast strip suitable for an overground high-rise building, and belongs to the technical field of building structures. The problems that the post-cast strip is reserved for a long time, a construction channel is blocked, and the construction difficulty is increased are solved. The expansion type post-cast strip comprises two pre-cast common concrete floor slabs, a post-cast expansive concrete section and a modular finished reinforcement cage, the pre-cast common concrete floor slabs are cast on the two sides of the post-cast expansive concrete section, and the modular finished reinforcement cage is arranged in the post-cast expansive concrete section. Compared with a traditional reinforcing band, the expansion type post-cast strip can be made of common concrete beyond the band width range, shrinkage-compensating concrete is prevented from being adopted for the whole plane, and the manufacturing cost is greatly saved; the adopted modularized finished reinforcement ca