The invention relates to a switch cabinet isolation baffle plate locking alarm device. The device is characterized in that the device comprises a data acquisition node, a mobile base station, a concentrator, an internet server and an upper computer. The data acquisition node is in wireless data transmission with the concentrator through the mobile base station; and the concentrator transmits the acquired data to the upper computer through the internet server. The data acquisition node comprises a node MCU control module. The node MCU control module is connected with a node power module, a nodereading module and a node wireless module; the node reading module is connected with a relay module; the node wireless module is a GSM communication module; the node reading module obtains trigger signal data of the relay module; and the node MCU control module is also connected with a local alarm.