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This invention relates to the field of brine drainage technology for salt caverns, and provides a wellbore structure for brine drainage from salt caverns, comprising at least: a gas injection well located above the salt cavern and extending from the surface into the salt cavern; a first row of brine wells located above the salt cavern and extending from the surface to the bottom of the salt cavern, with drill pipes installed in the first row of brine wells; and a second row of brine wells located outside the boundary of the salt cavern and extending from the surface beyond the bottom of the salt cavern, with the well body of the second row of brine wells extending towards the first row of brine wells so that the drill pipes at least partially extend into the second row of brine wells. In this wellbore structure for brine drainage from salt caverns, the first and second rows of brine wells are designed with vertical alignment, wherein the second row of brine wells is located at the edge of the salt cavern and extends towards the first row of brine wells via a double-angle drilling method, forming a connection with the first row of brine wells. This allows for the complete drainage of brine from the salt cavern, increasing the gas storage space.