Cotton yarn winding device

The utility model discloses a cotton yarn winding device which comprises a workbench, a plurality of winding mechanisms, a tensioning mechanism, a cleaning mechanism and a scraping mechanism, the tensioning mechanism is arranged on one side of each winding mechanism and comprises two supporting blocks and a gravity block, and sliding grooves are formed in the supporting blocks respectively; the two ends of the gravity block are slidably connected with the sliding grooves, and a threaded hole is formed in the gravity block. The cleaning mechanism is arranged on one side of the tensioning mechanism; the scraping mechanism comprises a material collecting box, a material collecting plate and a plurality of elastic scraping pieces, and the material collecting box is arranged at the bottom of the cleaning mechanism; the material collecting plate is arranged on the material collecting box; the multiple elastic scraping pieces are arranged on the material collecting plate, and one ends of the elastic scraping pieces