The invention relates to a technology for using twin-well asymmetrical brine collection to quickly build a salt cavern storage cabin. The technology specifically comprises the steps of using communication of a large-well-spacing twin well in a well-and-rock-salt mine area to conduct asymmetrical water dissolving mining on rock salt, and quickly building a single cavern in a salt-bearing strata; at the same time adjusting position of a pipe orifice of a production casing by combining a detection result of an underground salt cavern and using a pipe cutting method so that a shape of an underground salt collecting cavern is controlled artificially, and the size and shape of the salt collecting cavern can finally conform to a cavern building standard of a oil-storage-gas-storage cavern, wherein in the cavern building process, spacer liquid or spacer gas do not need to be injected. According to the technology for using twin-well asymmetrical brine collection to quickly build salt cavern storage cabin, the oil-storage-gas-storage cavern can be built in various kinds of well and rock salt, and the technology is particularly applicable to building of a large scale single cavern in an ultra-thick rock salt seam; meanwhile, brine concentration is increased, cavern building period is sharply shortened, and building cost of the salt cavern storage cabin is lowered.