The invention relates to an automatic cable take-up and pay-off device, and mainly aims to solve the problems that a cable has high probability of damage and the mounting labor intensity is high since a shaft in a conventional cable take-up and pay-off device is directly fixed. The automatic cable take-up and pay-off device is characterized in that a fixed bracket and a movable bracket are connected to the left side and the right side of a two-layered base correspondingly; a left half shaft seat and a right half shaft seat are connected to the upper parts of the fixed bracket and the movable bracket correspondingly and connected with a left half shaft bearing and a right half shaft bearing correspondingly; the left half shaft bearing and the right half shaft bearing are connected with a left half shaft and a right half shaft correspondingly, and the left half shaft and the right half shaft are fixedly connected with a left half shaft sleeve and a right half shaft sleeve correspondingly; a winch is connected between the left half shaft sleeve and the right half shaft sleeve; the left half shaft is fixedly connected with a gear wheel and a driving arm; and a hydraulic cylinder is fixed on the two-layered base. The automatic cable take-up and pay-off device has the advantages that the winch can be mounted conveniently with less effort, and the cable has low probability of damage.