An automobile aluminum or aluminum alloy part comprises an aluminum matrix and an anodization film attached outside the aluminum matrix, there is an electrodeposited organic hole sealing film outside the anodization film, and the electrodeposited organic hole sealing film is a film obtained through mixing an acrylic resin with an amino resin. The invention also discloses an anodization hole sealing method of the automobile aluminum or aluminum alloy part. The automobile aluminum or aluminum alloy part has better alkali and corrosion resistances that parts in the prior art.