The separation method of hydrocracked product of hydrocarbons incldudes stabilization tower, hydrogen sulfide washing tower, debutanizing tower, deethanizing column and light hydrocarbon absorption tower. The stabilizatino tower is designed according to cutting portion or all C6 component, the absorption oil of light hydrocarbon absorption tower is from tower bottom product flow of debutanizing tower, the overhead gas of stabilizaltion tower, overhead gas of debutanizing tower and overhead gas of deethanizing column are mixed, and fed into light hydrocarbon absorption tower to recover light hydrocarbon, and the tower bottom rich absorption oi lof light-hydrocarbon absorption tower and hydrogen sulfide washing tower feeding material coming from stabilizatino tower and mixed, and fed into hydrogen sulfide washing tower. The C3 and C4 components can be completely recovered, and its liquified gas yield is high.