Pipe column screwing-on and screwing-off automation device

The invention provides an automatic pipe column screwing-on and screwing-off device, and relates to the field of oil field operation equipment. The automatic pipe column screwing-on and screwing-off device comprises a hydraulic oil pipe holding and clamping device and a hydraulic oil pipe screwing-on and screwing-off clamp, the hydraulic oil pipe holding and clamping device comprises a base, the base is fixedly connected to an operation wellhead flange through a bolt, and the hydraulic oil pipe screwing-on and screwing-off clamp comprises a back-up clamp part and a main clamp part. A hydraulic lifting mechanism is fixedly connected to one side of the base, a lifting arm is fixedly connected to the telescopic end of the hydraulic lifting mechanism, a rotating arm is fixedly connected to the position, away from the jaw side, of the back-up tong part, and the first rotating arm is rotationally connected to the first lifting arm through a driving assembly. The device is simple in structure, small in size, light i