The invention discloses an automatic crimping system for a ground wire, which comprises a wire cutting module, a wire stripping module, a wire crimping control and execution module and a hydraulic pump station module, wherein the wire cutting module, the wire crimping control and execution module and the hydraulic pump station module are in quick release connection through quick-connect connectorsand cables. The wire crimping control and execution module comprises a clamping mechanism, crimping pliers and a rack platform, wherein the clamping mechanism is used for clamping a wire in the wirecrimping process; two pairs of crimping pliers are arranged along the moving direction of the wire, are respectively a pair of steel die crimping pliers and a pair of aluminum die crimping pliers, andare respectively used for steel die crimping and aluminum die crimping; the crimping pliers are mainly composed of a crimping pliers mechanism and a pressing plate mechanism, and are used for crimping the wire; and the rack platform is used for mounting the clamping mechanism and the crimping pliers and is used as a wire crimping operation platform. According to the invention, the automation of the crimping process can be improved to the greatest extent, the influence of human factors is reduced, the wire crimping construction efficiency is improved, and the wire crimping construction qualityis ensured.