The invention discloses an aluminum product surface processing method before coating. The processing method includes: grinding an aluminum product, washing, performing one-step zinc immersion with cyanide-free zinc immersion solution, washing, etching, washing, anodizing and washing. The processing method has the advantages that the cyanide-free zinc immersion process is added to a traditional process for the first time, the method is toxic-free, harmless and simple in waste water treatment, the wear resistance of obtained the aluminum product after coating can be increased greatly, experiment wear resistance times can reach more than 90, and device service life is prolonged; in addition, the cyanide-free zinc immersion solution is low in requirements of other steps and wide in application range, and stable wear resistance of the aluminum product, using the cyanide-free zinc immersion solution, after coating is achieved.