To form small-divided packages having uniform quality regardless of unreeling initial time and end time of a yarn feeding package, in a small-dividing system 1 for pulling out a yarn of the yarn feeding package and dividing and winding the yarn by predetermined length around a plurality of bobbins by a winding device 6.

This small-dividing system 1 has a length measuring and storing device 5 for measuring the length of a yarn Y unreeled from the yarn feeding package 3 and storing the yarn Y before it is wound around by the winding device 6. In addition, the small-dividing device 1 has a tenser 7 adjusting the tension of the yarn Y fed from the length measuring and storing device 5 to the downstream side.