Abstract: [Abstract]　In the 1950s，crime and horror comics were popular in the United States. The public believed that crime and horror comics would adversely affect young people and set off a national anti-comics campaign. In 1954，the US Senate held a hearing to investigate crime and horror comics and juvenile delinquency，and the American Comic Magazine Association established by the comics industry after the hearing. As a result， the American comic industry began decades of self-regulation to regulate the content of comic books. This paper reviews the historical origins and backgrounds of self-discipline in the American comics industry and the process of the US Senate hearing in 1954. It explores the deep reasons for the self-regulation of the American comic industry from political，economic，and cultural perspectives，and analyzes the self-regulation’s farreaching impacts on the American comic industry itself and American society as a whole.