The invention provides an electric engineer vehicle chassis maintenance device, comprising a cart, a regulating mechanism and a maintenance device. The cart comprises a handrail and a display control device, and the regulating mechanism, the maintenance device and the display control device are electrically connected and controlled by the display control device. The regulating mechanism comprises a supporting plate, a fixed trestle, a fixed arm, a telescopic arm, a vertical swinging arm, a horizontal swinging arm and a rotating arm, the maintenance device comprises a connection base, an adjustable connecting rod, a lighting camera device and a chassis maintenance tool. The lighting camera device comprises a mounting plate, a camera element and a lighting element, one end of the connection base is hinged to the other end of the rotating arm, the camera element and the lighting element are arranged on the mounting plate, the connector being connected with the chassis maintenance tool is arranged on the connection base, the chassis maintenance tool is connected with the connector of the connection base, and thus automated maintenance of an electric engineer vehicle chassis is realized.