On-site calibration device of storage battery online monitoring device

The utility model provides an on-site verification device of a storage battery on-line monitoring device, which comprises a box body, a middle supporting plate is arranged in the box body, a control mainboard is arranged above the middle supporting plate, a load mainboard is arranged below the middle supporting plate, the control mainboard is electrically connected with the load mainboard, and the load mainboard is electrically connected with the control mainboard. A first IO board and a second IO board are installed above the control mainboard, a plurality of storage battery signal input ports are installed at the rear end of the first IO board and the rear end of the second IO board, the storage battery signal input ports are installed on the rear side face of the box body in a penetrating mode, and the battery module and the signal selection switching board are installed in the box body and connected with the control mainboard. The front side surface of the box body is provided with a verification port and