The invention discloses a self-locking compression type portable grounding wire capable of being assembled and disassembled quickly, which comprises an upper clamping plate, a lower clamping plate, avertical clamping plate, a movable clamping plate, a supporting rod, a fixed clamping piece, a movable clamping piece, a round rod and an insulating rod, and is characterized in that one end of the upper clamping plate is connected with the upper end of the vertical clamping plate, one end of the lower clamping plate is connected with the lower end of the vertical clamping plate, one end of the supporting rod is connected with one end of the insulating rod, a first round hole is formed in the lower clamping plate, the other end of the supporting rod penetrates through the first round hole andextends out of the first round hole, the movable clamping plate is arranged at the end, which extends out of the first round hole, of the supporting rod, a wedge-shaped groove is formed in the supporting rod, a cavity is formed in the lower clamping plate, the fixed clamping piece is arranged on the side, which is close to the vertical clamping plate, in the cavity, the movable clamping piece is arranged on the side, which is away from the vertical clamping plate, in the cavity, a spring is arranged at the end, which is away from the vertical clamping plate, of the movable clamping piece, theother end of the spring is connected with the lower clamping plate, a clamping plate is arranged at the end, which is close to the vertical clamping plate, of the movable clamping piece and matched with the wedge-shaped groove.