The invention discloses a parallel gap structure of a power transmission and distribution line. The parallel gap structure comprises an upper arcing horn and a lower arcing horn, wherein each of the upper arcing horn and the lower arcing horn comprises a half upper arcing horn and a half lower arcing horn which are symmetrically arranged in a left-right way, the upper arcing horn and the lower arcing horn are respectively connected in parallel to two ends of an insulator string, the half upper arcing horn is fixed on an upper arcing horn support, the upper arcing horn support has a sheet-shaped structure having an L-shaped cross section, the sheet-shaped structure is formed by two steel plates perpendicular to each other, a ball head hanging ring is arranged between the upper arcing horn supports which are symmetrically arranged, a round ring of the ball head hanging ring is parallel to vertical steel plates of the upper arcing horn supports, the ball head hanging ring is fixedly connected by the vertical steel plates perpendicularly penetrating the two upper arcing horn supports and a bolt of the round ring, a connection plate having a strip-shaped structure is fixedly arranged at an installation end of the half upper arcing horn, and each connection plate is in bolt connection with a horizontal steel plate of the upper arcing horn support. By a parallel gap, the arcing horns can be rapidly assembled and disassembled, time and labor are saved, and the labor intensity of a worker is greatly reduced.