Building external wall thermal insulation structure

The utility model discloses a building external wall heat preservation structure which comprises six hollow bearing columns, the top of one side of each hollow bearing column is provided with a pouring threaded opening, a packaging cover is installed on each pouring threaded opening in a threaded mode, reinforcing plate ribs are installed between the hollow bearing columns, anti-corrosion plates are installed on the two sides of each bearing column, and the anti-corrosion plates are connected with the sealing covers through threads. The hollow bearing column has the beneficial effects that the hollow bearing column is poured, so that the stability of the hollow bearing column during use is improved, the hollow bearing column is not prone to deformation and damage, the use safety of the hollow bearing column is improved, and the hollow bearing column is convenient to use. Furthermore, the anti-seepage and anti-corrosion performance is improved through reinforcing plate ribs, an anti-seepage plate and an anti-c