Double-drum winch for steel wire operation of oil and gas well

The utility model discloses a double-drum winch for steel wire operation of an oil and gas well, which is characterized in that two steel wire drums are sequentially arranged on a rack along a steel wire rope outlet direction, and the height of the front-end steel wire drum arranged on the rack is lower than that of the rear-end steel wire drum arranged on the rack; a roller disc type brake mechanism connected with the corresponding steel wire roller is arranged on the portion, below each steel wire roller, of the rack, and a roller transmission mechanism in transmission connection with the corresponding steel wire roller is arranged on the rack. Equivalently, two sets of steel wire winches capable of working independently are mounted on one rack, when a steel wire wound on one roller reaches the service life and needs to be replaced, the roller can be conveniently disassembled, carried back and replaced, and meanwhile, the steel wire on the other roller is used, so that the work of transporting the whole set