Method for separating styrene from C8 fraction

The invention relates to a method for separating styrene from a C8 fraction. The method comprises the following steps: S1, introducing a C8 aromatic hydrocarbon fraction into the middle part of a first separation tower for separation, and discharging a first heavy component from a tower kettle; s2, the first heavy component is introduced into the middle of a second separation tower for separation, and a second light component is discharged from the top of the tower; s3, the second light component and a hydrogenation catalyst are introduced into a selective hydrogenation reactor, and a third component containing styrene flows out; s4, the third component is introduced into the middle of a third separation tower for extractive distillation, and a fourth component is obtained from a tower kettle; s5, the fourth component is placed in a desulfurization device, an adsorption desulfurization agent is added for adsorption desulfurization, and a desulfurized component is obtained; s6, filtering the desulfurized compo