The invention discloses a foam gas recovery wastewater treatment method and a foam gas recovery wastewater treatment apparatus. The foam gas recovery wastewater treatment method comprises: adjusting the pH value of foam gas recovery wastewater to more than 8.5, carrying out a precipitation reaction, and carrying out solid-liquid separation on the mixture obtained through the precipitation reaction; carrying out air flotation on the obtained liquid phase; adjusting the pH value of the air flotation effluent to a neutral pH value, and adsorbing with an adsorbent; and evaporating the adsorbing effluent to obtain clear water. With the treatment method of the present invention, the characteristics of the foam gas recovery wastewater are completely utilized, the type and the consumption of the used agents are reduced, the operation in the neutral and alkaline environment is achieved, the equipment investment cost is reduced, the hidden dangers on the equipment and the operation are reduced,the operation safety is improved, the good treatment effect can be achieved, the COD value and the mineralization degree of the foam gas recovery wastewater are effectively reduced, and the surfactantin the wastewater can be recovered.