The embodiment of the invention discloses a 10kV grounding wire device with a self-locking function. The 10kV grounding wire device comprises a dual-neck clamping wire clamp and an insulated operatingrod, and the dual-neck clamping wire clamp comprises a wire clamp base distributed in a C shape from bottom to top, a connection seat and an upper wire clamping seat, the insulated operating rod comprises a hollow outer cylinder, an operating inner rod penetrates the outer cylinder, the upper end of the operating inner rod passes through the wire clamp base and is connected with a lower wire clamping seat, the upper end face of the lower wire clamping seat is provided with a lower wire clamping groove, an upper wire clamping groove is arranged at the position, corresponding to the lower wireclamping groove, at the lower end face of the upper wire clamping seat, the inner side of the connection seat is provided with a wire clamping chute, a wire clamping sliding seat is slidingly arrangedin the wire clamping chute, and the lower wire clamping seat is connected with the wire clamping sliding seat. The double necks are adopted to clamp the wire so that the wire can be more firmly fixed, the reliability of the wire clamping is improved, and in the movement process of the lower wire clamping seat, the lower wire clamping groove and the upper wire clamping groove are aligned all the time to further improve the reliability of fixing of the wire.