The present disclosure relates to an integrated treatment method of two-stage submerged combustion evaporation for organic waste liquid, the organic waste liquid to be disposed flowing into two evaporation chambers in succession for two-stage submerged combustion evaporation. The two evaporation chambers are provided in one evaporation tank and communicate with each other at the bottom of the evaporation tank, the organic waste liquid enters a first evaporation chamber from a raw liquid inlet pipe, and the organic waste liquid flows from the first evaporation chamber to a second evaporation chamber during submerged combustion evaporation. The method has advantages of improving the evaporation concentration efficiency, reducing the numbers of evaporators and transport pipes of all sorts of gases and liquids and saving energy, saving the area occupied and the cost, while simplifying treatment process and facilitating operation management.