In poster design, apple element is used to combine it with children’s head silhouette, and explore the visual principle by using the relationship between elements sharing and mutual existence. The work skillfully uses images to form heterosexual isomorphism. In poster design, apple symbolizes that children who deprive of personal freedom and are sold are complete individuals like apples. If they are forced to bite off, their behaviors have been on the road of illegal crimes. The works satirize the “robber” way of those traffickers, leaving the fact that can not be lost.