The invention discloses an adjustable rotary ground wire device. The adjustable rotary ground wire device comprises an insulation operating rod, a ground end clamping plate and a ground soft copper wire, wherein the ground end clamping plate is a clamping device connected with the ground network or a ground end, a top end fixing device of the insulation operating rod has a holding-on crankset, the holding-on crankset is provided with a double-tongue tension type wire clamp capable of realizing rotation around the holding-on crankset for adjusting and fixing, and two ends of the ground soft copper wire are respectively connected with the ground end clamping plate and the double-tongue tension type wire clamp. The adjustable rotary ground wire device is advantaged in that problems of increase of workload of operators and prolongation of the power failure operation time because of difficulty in guaranteeing quality of ground wire connection and disconnection during maintenance operationcaused by unavoidable unsafe behaviors of the operators and hidden troubles in the maintenance process because of structure characteristics of a ground wire in the prior art can be effectively solved.