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Hollow-core cotton yarn can be obtained by using water soluble PVA filament as the core which will be removed later and cotton fibers as sheath wrapping on the core.Six kinds of fabric are studied and the test data of water absorption rate,diffusion time and residual water rate are compared and analyzed.Cotton hollow yarn fabric has a better moisture and quick drying than common yarn fabric.The theoretical analysis of cotton hollow yarn fabric quick drying and moisture absorption mechanism provides theoretical support for further enhancing hollow cotton yarn fabric performance.