The invention discloses a cold mould sanding centrifugal casting technique of a large-size dual-flange copper alloy bearing bush. The technique process is that technique designing-designing tools-production tools-processing tools-air-bleed hole making-sanding- moulding-bleed hole pricking-die filling-roasting-liquid copper melting-centrifuge start-up-rotating speed controlling-casting-mold unloading and bearing bush taking-rough processing-testing-goods delivery. The technique has stable quality and can eliminate rolling skins, cracks, air holes and cinder inclusion of the copper alloy bearing bush, thereby having wide potential application.