Electronic control swing arm device

The utility model provides an electronic control swing arm device, which comprises fixed pulleys, a hydraulic cylinder, a swing arm, a moving pulley and a rack, wherein the fixed pulleys are fixedly arranged at the two ends of the rack through a fixing shaft, and the moving pulley is positioned inside the rack; the hydraulic cylinder is fixedly arranged in the rack through a flange, and the swing arm is fixedly arranged on the rack through a fixing shaft; the swing arm is positioned below the hydraulic cylinder. The electronic control swing arm device provided by the utility model has the advantages of stable structure, and fine adjustment process.