A multipolar cell power supply device and a flashlight using the same are provided. The multipolar cell power supply device includes a shell, an electric core inside the hollow part of the shell, a positive pole power distribution unit and a negative pole power distribution unit arranged on the two ends of the shell and respectively corresponding to the positive pole and the negative pole of the electric core, a conductive sheet group for electrically connecting the positive pole power distribution unit to the negative pole power distribution unit, and a controller which is on the end of the shell and electrically connected with the positive pole power distribution unit. The flashlight includes a tube body, the multipolar cell power supply device, a tube head provided with an illuminant and an back end cover provided with a soft cap cover which is corresponding to a signal switch of the controller.