Method and Device for Catalytic Cracking

Provided is a method for catalytic cracking. The method comprises: a regenerated catalyst entering a pre-rising section (VIII) is mixed with raw oil and fed to a raw oil reaction area (I) for a catalytic cracking reaction; the catalyst and the oil-gas flow upwards into a catalyst-separating area (III) where part of the catalyst separates and flows into a stripping area for the catalyst to be regenerated (V, VII); the non-separated catalyst and the oil-gas together continue to flow upwards and are then mixed in an oil-gas repeat reaction area (II) with a regenerated catalyst entering into a supplementary catalyst distribution area (IV) and the oil-gas undergoes a repeat catalytic reaction; then the oil-gas and the catalyst in a riser reactor undergo gas-solid separation in a settler (VI), with the oil-gas entering a fractionating tower system via an oil-gas line, and the catalysts to be regenerated in the raw oil reaction area (I) and the oil-gas repeat reaction area (II) entering a regenerator (13), after being steam-stripped in the stripping area for the catalyst to be regenerated, in order to be reactivated. Also provided is a catalytic cracking device for use in the above-mentioned catalytic cracking method.