Coupling method of cracking, coking and coke gasification

The invention relates to a processing method of hydrocarbon raw materials, in particular to a coupling method of cracking, coking and coke gasification. The coupling method comprises the following steps: with coke particles as coking particles, circulating the coke particles in a cracking reactor, a fluidization coking reactor and a coke gasification reactor which communicate with each other in sequence; and allowing coke generated in a cracking reaction and a coking reaction to be loaded on the coke particles, then enabling the coke particles to enter a coke gasification reactor to convert the loaded coke into gasified gas, and allowing the coke particles having undergone a gasification reaction to continue to serve as a heat carrier and a carbon carrier and to enter the cracking reactor. According to the method, the contradiction that the selectivity of olefin generated by a catalyst or a carrier and the coke carrying capacity are mutually restricted in an existing process for preparing olefin through hydro