The 1000L large photoresist IBC tank suits bulk storage and transport of high-purity photolithography raw materials at chip plants. The thickened body, paired with a fully enclosing protective steel frame, resists deformation and impact under heavy loads. The finely polished inner wall has no fine pits or gaps, preventing photoresist media from clinging and leaving residue and keeping batch purity stable. Acid pickling and passivation of the outer wall forms a rust-proof layer that resists chemical vapour corrosion in the plant. An integrated large-diameter discharge valve at the base suits automated pipeline unloading, and the standard forklift base fits large-scale plant storage and transfer lines.