A method for using an easily stored tangle-reducing and unbalanced load-prevention device having an adjustable diameter and being used with a washing machine, the easily stored tangle-reducing and unbalanced load-prevention device having an adjustable diameter and being used with a washing machine comprising an upper insert and a lower insert; the upper and lower inserts are mutually inserted and connected by means of upper and lower insert slots so as to form a cross-shaped combined body; an adjustable separator is fixed, according to the size of the inner diameter of a washing tub, to separator adjusting positioning holes of the upper insert and separator adjusting positioning holes of the lower insert at different positions such that the size of the cross-shaped combined body matches the inner diameter of the washing tub.
