Catalytic pyrolysis process for producing petroleum hydrocarbon of ethylene and propylene

The invention discloses a catalytic pyrolysis process for producing petroleum hydrocarbon of ethylene and propylene which comprises, feeding preheated petroleum hydrocarbon raw material into lift tubes, contacting phosphor modified five-membered ring high silicon zeolite catalyst for reaction under the condition of catalytic thermal cracking, thus separating the reaction product and catalyst to be produced, then loading the reaction product into subsequent separation system for product separation, stripping and regenerating the catalyst, returning to reactor for circulation.