The invention relates to a plug-and-play implementation method and device for a low voltage power distribution device based on a cloud platform. The device is characterized in that a QR code of a plug-and-play device is scanned, the information of a low voltage power distribution device is inputted, dedicated software of the device is downloaded from the cloud platform to the device through an uplink interface, and plug and play of the power distribution device are realized. The plug-and-play device of the low voltage power distribution device based on the cloud platform includes the uplink interface, a core processor module and a downlink interface which are electrically connected in sequence, wherein the uplink interface is used for implementing communication between the plug-and-play device and the cloud platform, the downlink interface is used for connecting the plug-and-play device with the low voltage power distribution device, the core processor module is used for controlling the uplink and downlink interfaces of the plug-and-play device and realizing data interaction between the low voltage power distribution device and the cloud platform. The device is advantaged in that fast access to the low voltage power distribution device can be realized, production efficiency is increased, a remote upgrade function of the low voltage power distribution device can be realized by the plug-and-play device, and the device is convenient for on-site operation and maintenance personnel to operate.