The utility model relates to a belt conveyor bearing roller dismounting device belongs to bearing roller dismounting technology field, the technical problem that will solve does: the utility model provides a simple structure, the integrated degree of function is high, and convenient to use is laborsaving, belt conveyor bearing roller dismounting device that work efficiency is high, the problem ofthis technique is solved the technical scheme who adopts does: a belt conveyor bearing roller dismounting device, includes the support, the support comprises working face and landing leg, having set gradually replacing bar on the working face, having dismantled groove and mounting groove, the downside at the working face both ends is installed perpendicularly to the landing leg, replacing bar is the cavity pipe fitting, and the replacing bar internal diameter is greater than the diameter of bearing roller axle, is lighter than the inner circle external diameter that holds in the palm the kun bearing, and replacing bar installs perpendicularly on the working face, dismantling the groove and being annular die with the mounting groove, the mould diameter suits with bearing roller axle diameter, the utility model discloses but the wide application is in dismantling the conveyor carrier roller field.