Method for roasting and starting aluminum electrolytic cell

The invention discloses a method for roasting and starting an aluminum electrolytic cell. The method comprises the following steps: firstly, evenly and compactly filling conductive bulky grain materials among wall bodies which are projected on cathode abnormal carbon blocks of the electrolytic cell; using coke grains for pouring cracks and filling gaps among the bulky grain materials; laying cokegrains on upper surfaces of the abnormal carbon blocks and the filled bulky grain materials; after laying coke grains of a group of anodes, placing a group of anodes thereon; then installing a soft connector, a current-dividing sheet and a current-dividing steel belt; filling the materials which takes electrolyte powder as the main component in a furnace and evenly laying the materials around theelectrolytic cell; detaching the current-dividing plate and the current-dividing steel belt by phases through electrifying and roasting according to the downtrend of voltage; and when most materials in the gaps of the anodes a