A power supply device of an electronic cigarette is disclosed, the device comprising a battery and a control board installed inside a battery sleeve; the power supply device further comprises electrode connectors provided at one end of the battery for connecting an atomizer as a load into the circuit loop of the electronic cigarette, wherein the electrode connectors comprises a negative pole connector coupled to one end of the battery sleeve; a positive pole connector sit inside the negative pole connector; an insulation ring being provided between the negative pole connector and the positive pole connector to achieve electric isolation; the controlling board being provided at the other end of the battery inside the battery sleeve; the controlling board is integrated thereon a controller, a LED light and an airflow switch; the controller connecting the load connected between the positive pole connector and the negative pole connector into the power supply loop of the battery and controlling on/off of the LED light.