The invention belongs to the technical field of oil-gas field chemical accessories, and in particular relates to a foaming drainage agent resisting methanol, condensate oil and high salinity. The foaming drainage agent is compounded from various nonionic surfactants, an anionic surfactant, an amphoteric surfactant, a drag reducer and pure water, wherein the various nonionic surfactants comprise polyether type surfactants including fatty alcohol-polyoxyethylene ether and alkyl alcohol ether carboxylate, the anionic surfactant comprises sodium lauryl alcohol sulfate and a Gemini cationic surfactant, the amphoteric surfactant is dodecyl dimethyl betaine, and the drag reducer is polyethylene glycol. The foaming drainage agent has relatively good biodegradability, and cannot be deposited and layered when in use. The foaming drainage agent provided by the invention is strong in foaming power, has rich and stable foams, is moderate in salt resistance, can be used in an oil-water-gas three-phase coproduction well containing condensate oil, has excellent foaming performance, is good in compatibility with various corrosion inhibitors, and also has good corrosion inhibiting ability.