The invention discloses a non-uniform blanking method for an aluminum electrolytic bath. The non-uniform blanking method comprises the following steps: selecting the volumes and the sizes of fixed containers at all blanking points according to the flowing forms of an electrolyte in the bath and the concentration distribution of aluminum oxide, and performing comparative estimation on configurations of the obtained fixed containers by adopting a simulation method, to determine proper non-uniform fixed container configurations; adjusting a blanking interval according to the selected volumes and sizes of the fixed containers to make sure that the total blanking amount of the electrolytic bath is constant within a certain time period. By the application of the method disclosed by the invention, the sizes of all the fixed containers can be adjusted in a targeted manner according to different regional flowing characteristics of the electrolyte in the bath, so that the regional concentration difference of aluminum oxide in the electrolyte is reduced, the concentration distribution of the aluminum oxide is optimized, and steady operation of the electrolytic bath is promoted.