The utility model relates to a generating line earthing device especially relates to a 10kV cubical switchboard generating line earthing device. Including the chassis car, have the toolbox on the car of chassis, install grounding contact on the car of chassis, install safety shield above the car of chassis, safety shield upper portion corresponds the position with the cubical switchboard contact and has a plurality of through -holes, and warning sign rotary mechanism is installed to one side of chassis car. Electricity, grounding handcart function collection in an organic whole will be tested to this device, and be equipped with linkage warning device and transparent material's safety protection baffle. This device possesses the electricity of testing, ground connection function, and can realize effective shutting of device and switch cabinet doors, effectively avoids operating personnel's maloperation and operating personnel direct contact cabinet inner zone electric installation, the security that has improved personnel and equipment. This device commonality is strong, has reduced operation flow and operating personnel's work load, and effective solution is putd aside formula cubical switchboard generating line and is tested electricity, ground connection problem, has further promoted 10kV cubical switchboard safety control level.