This all-steel foldable 12-gear slat base is constructed entirely of thickened high-carbon steel without wooden accessories, featuring outstanding moisture-proof, mildew-proof and moth-proof performance, perfectly suitable for humid living environments. Equipped with a 12-level adjustable gear structure, users can freely adjust the lifting angle of the head and foot area to meet multiple usage scenarios such as flat sleep, reading, watching videos and leg raising for relaxation, effectively relieving waist and leg pressure. The middle frame adopts high-strength folding hinge connection, which can be folded flat for packaging to save storage and transportation space and reduce logistics costs for dealers and mattress factories. The full-welded steel structure delivers ultra-high load-bearing capacity, stable and shake-free after unfolding, free of bending and deformation under long-term heavy pressure. All steel surfaces are treated with electrostatic anti-rust spraying to resist oxidation, scratches and damp erosion for long service life. Silent anti-friction gaskets are installed at all contact parts to eliminate abnormal creaks during angle adjustment and body turnover, ensuring a quiet rest environment. Uniform slat layout realizes balanced force dispersion, smooth air circulation under the mattress to avoid damp mildew and odor accumulation. It is compatible with latex, spring, memory foam and all mainstream mattresses, supporting customized sizes, bulk wholesale and OEM supporting cooperation.