Automatic steel bar binding device

The utility model belongs to the technical field of steel bar binding, and particularly relates to an automatic steel bar binding device which comprises a binding machine with a steel bar binding function, a grab handle is arranged at the lower end of the binding machine, a movable battery is arranged at the lower end of the grab handle, and a limiting device is installed on the surface of the grab handle. When in use, the limiting device deflects downwards and blocks the movement of the two ends of the mobile battery, so that the movement of the mobile battery is limited. According to the automatic reinforcing steel bar binding device, the limiting device is installed on the surface of the grab handle, a threaded pipe in the limiting device rotates to enable a sleeve to descend, then the friction area between the surface of the grab handle and the surface of a palm is increased, grabbing is facilitated, and meanwhile the sleeve downwards extrudes a limiting plate; and the limiting plates clamp and limit the