The invention discloses a foam scrubbing agent with gas condensate resistance and salt resistance and a preparation method of the foam scrubbing agent and belongs to the technical field of gas well exploitation materials in the oil and gas field. The foam scrubbing agent is prepared from raw materials in percentage by mass as follows: 20%-30% of cocamido propyl hydroxy sulfobetaine, 10%-20% of erucylamide propyl betaine, 10%-20% of lauramidopropylamine oxide, 2%-5% of sodium dodecyl sulfate, 1%-2% of a foam stabilizer, 1%-2% of sodium salt and the balance of water. The foam scrubbing agent is applicable to well gas exploitation and has good gas condensate resistance and salt resistance capability.