A new and distinct cultivar of Chrysanthemum plant named ‘；Dochrysbumb’；, characterized by its upright to somewhat outwardly spreading and uniformly and mounded plant habit； moderately vigorous growth habit； freely branching habit； dense and full plant form； uniform and freely flowering habit； medium-sized to large decorative-type inflorescences with dark yellow-colored ray florets； freely and early flower habit； and good postproduction longevity.
