The invention discloses a method for pulling out a halogen discharging pipe, which belongs to the technical field of a salt cavern underground gas reservoir. The method comprises the following steps:loading a cutting apparatus into a halogen discharging pipe, cutting the halogen discharging pipe by using the cutting apparatus, so that the lower end surface of the halogen discharging pipe is located in a first casing pipe; loading a first oil passing pipe expansion-type packer into the halogen discharging pipe until the first oil passing pipe expansion-type packer extends out of the halogen discharging pipe and seals the first casing pipe; and uplifting the halogen discharging pipe until the halogen discharging pipe is pulled out of the first casing pipe. According to the method for pulling out the halogen discharging pipe provided by the invention, when the halogen discharging pipe is uplifted, only the halogen discharging pipe in an oil pipe needs to be uplifted without driving the first oil passing pipe expansion-type packer to move upwards, and the high-pressure natural gas in an inner cavity of the salt cavern can be prevented from entering the upper part of the oil pipe, so that the abrasion for the first oil passing pipe expansion-type packer can be avoided, and the well control risk can be reduced.