The invention relates to an environment-friendly aluminum alloy normal temperature water-based cleaning agent and application thereof, and belongs to the technical field of cleaning agents. The formula is reasonable and scientific, preparation is simple, special equipment is not needed, and above raw materials only need to be mixed at the normal temperature; and the cleaning capacity is high, time is short, the working efficiency is good, extremely-high cleaning efficiency is achieved on oil stains on the metal surface, in particular to the aluminum alloy surface, oil contamination on the surface can be thoroughly removed through cleaning, and the degreasing rate of the final formula can reach 98% or above.