The invention provides a power supply device, which comprises a shell and a handle, wherein one end surface of the shell is provided with a power jack for accommodating a power plug; the handle is arranged on the shell in a sliding mode; the handle is provided with an abutting part; when the handle slides to a first position, the handle blocks the power jack; and when the handle slides to a second position, the abutting part abuts against the power plug at the power jack. The power supply device can prevent the power plug from being loose accidentally and reduce hidden safety dangers. The invention also provides a cabinet, which comprises the cabinet body and the power supply device, wherein the power supply device is arranged in the cabinet body.