Sampling auxiliary tool of oil current transformer

The invention discloses a sampling auxiliary tool of an oil current transformer. The sampling auxiliary tool comprises a first clamping piece and a second clamping piece, wherein the first clamping piece can be arranged on an oil pipe in a sleeving manner and clamp the oil pipe, and the second clamping piece can be arranged on an oil extraction cap in a sleeving manner and clamp the oil extraction cap. The first clamping piece is rotatably connected with a transmission mechanism. A connecting mechanism which is driven by the transmission mechanism to rotate and can extend in the axial direction is arranged on the transmission mechanism. The maximum axial extending distance of the connecting mechanism is larger than the length of a thread segment of the oil extraction cap. The second clamping piece is connected with the connecting mechanism. The oil pipe cannot axially rotate when the oil extraction cap is unscrewed, workers can work at high altitude with the single hand, and potential safe hazards are eliminated. The sampling auxiliary tool is simple in structure, small, light and convenient to carry and use; through the tool, work procedures are simplified, the time spent in taking oil samples is shortened, and work efficiency is improved; and the good popularization significance is achieved.