The invention discloses a method for preparing nickel-aluminum hydrotalcite by using nickel-containing wastewater. The method is implemented through adding corresponding aluminum-containing wastes into nickel-containing wastewater in a certain molar ratio so as to form water-insoluble nickel-aluminum hydrotalcite. The method disclosed by the invention can be used for realizing circular economy and clean production, improving the conversion rate and cycle utilization rate of electroplated material resources, effectively controlling wastewater and protecting the environment, thereby providing a new process for the industrial production of nickel-aluminum hydrotalcite.