The invention discloses an assembly structure of a dust-sticking roller and a bearing applied to a dust-sticking machine. The assembly structure comprises the dust-sticking roller and the bearing which is used for supporting two axial ends of the dust-sticking roller; the dust-sticking roller and the bearing are connected together to form an integrated structure, so that the dust-sticking roller can be tightly fixed to the bearing; the phenomenon that the bearing loosens and falls off is effectively avoided; the uniform dust-sticking effect of the dust-sticking roller is ensured.