Hydrocracking method for producing high-octane petrol

The invention discloses a hydrocracking method for producing high-octane petrol, which comprises the following steps that: raw oil and hydrogen gas are mixed and then enter a first reactor for impurity removal reaction; and reaction effluent enters a second reactor for hydrocracking reaction which uses an appropriate catalyst and is performed under a certain content of nitrogen. Compared with the prior art, the method has the characteristics of machining poorer raw materials and having long running period of the catalyst, good quality of a hydrocracking product and the like. The method is mainly used for the hydrocracking technological process for producing the high-octane petrol by using diesel fractions with various high arene contents as raw materials.