The invention relates to a method for recovering an oil solution and a device thereof, in particular to a method for recovering lubricant in the production technology of a PTFE bulked film and a device thereof. The method for recovering the lubricant in the production technology of the PTFE bulked film comprises the following steps: the PTFE film is conveyed into a high temperature heating oven by a conveying roller; hot lubricant gas in the oven is pumped out by a pipeline; the absorbed hot lubricant gas is cooled; the cooled lubricant gas is conveyed to a recovering tank which is provided with a plurality of layers of bumping structures composed of isolated layers and bumping plates, wherein, small holes are arranged on the isolated layers and exhaust clearances are arranged on the bumping plates; and the lubricant is recovered from the bottom of the recovering tank and gaseous matters are exhausted from the upper part of the recovering tank through the bumping structures and then discharged. The invention also discloses a dedicated device of the method. In addition, the invention can completely recover the lubricating oil which is then reused and repeated in a cycle way, thus being capable of not only saving energy, but also ensuring environmental protection.