Ground wire device used for line insulation test as well as line insulation test method thereof

The invention discloses a ground wire device used for a line insulation test as well as a line insulation test method thereof and aims at providing a ground wire device capable of improving operationefficiency and used for a line insulation test as well as a line insulation test method thereof. The ground wire device comprises a wire end clamp used for clamping a wire during operation, a grounding operating stick connected with the wire end clamp, a grounding end clamp which is used for clamping a grounding body during operation and is provided with an operating bolt as well as a short-circuit wire with the two ends respectively connected with the wire end clamp and the grounding end clamp; and the ground wire device also comprises a butterfly bolt which is screwed on the grounding end clamp by virtue of a screw thread and used for being connected with a test wire of an insulation megohm meter, an operating head clamped and connected with the operating bolt on the grounding end clampas well as an operating ro