Battery aluminum foil and processing method thereof

The invention discloses a battery aluminum foil and a processing method thereof. An aluminum foil blank is subjected to foil rolling to obtain an aluminum strip, the foil rolling process sequentially passes through a first rolling pass, a second rolling pass and a third rolling pass, the first rolling pass and the second rolling pass are used for continuous rolling, the aluminum foil blank is naturally cooled at room temperature for 8 hours, and then third rolling pass of rolling is performed to obtain the aluminum strip; the aluminum strip is naturally cooled for 8 hours, and then intermediate rolling is performed to obtain an aluminum coil, wherein the coil temperature is less than or equal to 75 DEG C; the aluminum coil is subjected to finish rolling after being cooled for 8 hours to obtain a finished aluminum coil, and the coil temperature is smaller than or equal to 80 DEG C; and the finished product aluminum coil is cut off line to obtain the battery aluminum foil. Compared with the prior art, the atten