The invention discloses a catalytic conversion method for lowering the benzene content of a benzene-rich gasoline component, and aims to solve various problems caused by excessively high reaction temperature, excessively low reaction pressure and excessively low mass ratio of the benzene-rich gasoline component and methanol in a conventional method for lowering the benzene content of the benzene-rich gasoline component by performing alkylation reaction on the benzene-rich gasoline component and methanol. According to the method, the weight flow ratio of the benzene-rich gasoline component and methanol is 2.0 to 10.0, the reaction temperature is 300 to 375 DEG C, the reaction pressure is 0.8 to 3.0 MPa, the weight hourly space velocity of liquid is 1.0 to 5.0 h<-1>, a catalyst consists of 55 to 91 weight percent of HZSM-5 type molecular sieve, 0 to 25 weight percent of HY type molecular sieve, 0 to 25 weight percent of Hbeta type molecular sieve, 0 to 15 weight percent of oxide of a modifying element and 9 to 45 weight percent of adhesive, and the modifying element is phosphorus, iron, magnesium, silver, a rare earth element or zinc.