Abstract: A handy adjusting assembly for disposable cup holder, including a cup sleeve for containing disposable cups; a sleeve connector screwed on lower end of the cup sleeve, lower end of the sleeve connector being formed with an outward extending cover shade, an inner surface of upper end of the cover shade being formed with a stopper portion; an adjusting ring screwed on the lower end of the sleeve connector and being provided with a plurality of support seats each of which is formed with a strip hold; and a plurality of support strips extending through the strip holes of the support seats to hang thereon, upper portion of each of the support strips extending outside the adjusting ring and lower portion thereof extending inside the adjusting ring, upper end of the support strip abutting against the stopper portion of the sleeve connector whereby by means of adjusting the height of the adjusting ring, lower ends of the support strips can be moved inward and outward to hold various disposable cups with different siz