A process for producing catalytic cracking gasoline comprising in a first alternative the following steps: i) spraying a heavy feedstock oil into a riser reactor via a first nozzle, injecting the first catalytic cracking catalyst into the riser reactor at a first injection point located below the first nozzle, and subjecting the heavy feedstock oil to a catalytic cracking reaction to obtain a first reaction product; ii) spraying a hydrogenated cycle oil into the riser reactor used in the step i) via a second nozzle, injecting the second catalytic cracking catalyst into the riser reactor at a second injection point located below the second nozzle, and subjecting the hydrogenated cycle oil to a catalytic cracking reaction to obtain a second reaction product; iii) separating a mixture of the first reaction product and the second reaction product to obtain a catalytic cracking gasoline and a catalytic cracking light cycle oil; iv) subjecting the catalytic cracking light cycle oil or a fraction thereof to hydrogenation to obtain a hydrogenated product; and v) recycling the hydrogenated product to the step ii) as the hydrogenated cycle oil, wherein, along the height direction of the riser reactor, the second nozzle is disposed above the first nozzle, and the second injection point is disposed at a position between the first nozzle and the second nozzle; or wherein the process comprises in a second alternative the following steps: i) spraying a heavy feedstock oil into a primary riser reactor via a first nozzle, injecting the first catalytic cracking catalyst into the primary riser reactor at a first injection point located below the first nozzle, and subjecting the heavy feedstock oil to a catalytic cracking reaction to obtain a first reaction product; ii) spraying a hydrogenated cycle oil into a secondary riser reactor via a second nozzle, injecting the second catalytic cracking catalyst into the secondary riser reactor at a second injection point located below the second nozzle, and subjecting the hydrogenated cycle oil to a catalytic cracking reaction to obtain a second reaction product; iii) separating a mixture of the first reaction product and the second reaction product to obtain a catalytic cracking gasoline and a catalytic cracking light cycle oil; iv) subjecting the catalytic cracking light cycle oil or a fraction thereof to hydrogenation to obtain a hydrogenated product; and v) recycling the hydrogenated product to the step ii) as the hydrogenated cycle oil, wherein the second reaction product is fed into the upper middle portion of the primary riser reactor, where it is mixed with the first reaction product. i) spraying a heavy feedstock oil into a riser reactor via a first nozzle, injecting the first catalytic cracking catalyst into the riser reactor at a first injection point located below the first nozzle, and subjecting the heavy feedstock oil to a catalytic cracking reaction to obtain a first reaction product; ii) spraying a hydrogenated cycle oil into the riser reactor used in the step i) via a second nozzle, injecting the second catalytic cracking catalyst into the riser reactor at a second injection point located below the second nozzle, and subjecting the hydrogenated cycle oil to a catalytic cracking reaction to obtain a second reaction product; iii) separating a mixture of the first reaction product and the second reaction product to obtain a catalytic cracking gasoline and a catalytic cracking light cycle oil; iv) subjecting the catalytic cracking light cycle oil or a fraction thereof to hydrogenation to obtain a hydrogenated product; and v) recycling the hydrogenated product to the step ii) as the hydrogenated cycle oil, i) spraying a heavy feedstock oil into a primary riser reactor via a first nozzle, injecting the first catalytic cracking catalyst into the primary riser reactor at a first injection point located below the first nozzle, and subjecting the heavy feedstock oil to a catalytic cracking reaction to obtain a first reaction product; ii) spraying a hydrogenated cycle oil into a secondary riser reactor via a second nozzle, injecting the second catalytic cracking catalyst into the secondary riser reactor at a second injection point located below the second nozzle, and subjecting the hydrogenated cycle oil to a catalytic cracking reaction to obtain a second reaction product; iii) separating a mixture of the first reaction product and the second reaction product to obtain a catalytic cracking gasoline and a catalytic cracking light cycle oil; iv) subjecting the catalytic cracking light cycle oil or a fraction thereof to hydrogenation to obtain a hydrogenated product; and v) recycling the hydrogenated product to the step ii) as the hydrogenated cycle oil, wherein the second reaction product is fed into the upper middle portion of the primary riser reactor, where it is mixed with the first reaction product.