Abstract: Three kinds of process technology of spinning core-sheath filament/staple composite yarns on the ring spinning frame using rigid,flexible and elastic filaments were introduced.The classification,mixing mode and the structure of core-sheath filament/staple composite yarns were illuminated.An analysis of the migration mechanism of fibers and the unreeled conditions of rigid,flexible and elastic filaments was made,and the spinning parameters were analyzed and optimized.Then,the process technology of spinning core-sheath filament/staple composite yarns on the ring spinning frame using rigid,flexible and elastic filaments was put forward.Finally,the application of filament/staple composite yarns and their development prospect were discussed.