AJ77D single-layer big-hole aluminium alloy shutter sheet has the effective width of 77mm, big holes of 100mm*40mm in, and the space of 50mm between holes, an organic glass insertion slot of 50mm wide on the back helpful for natural lighting and airtight dust prevention. The design of unique noise-elimination leather lace between sheets well realizes the silence at motion. It is applicable to banks and stores, and as well as villas, factories and warehouses combining 77A double-layer aluminium alloy shutter sheet.with the operative width not more than 8,000mm.