This paper examined the Execution of Communist Collaboration (so-called BUYEAKJA) during the Korean War through tracing the 'No Gun Ri`s File'. The main points and arguments of this paper are as following. The Press reports Korea Government mass executions follows. LONDON TIMES, Oct. 25, Story concludes from observation that compaints various abuses against North Korea Government could be levelled as well against ROK, only difference between two governments being that “at present men and women accused of being communists or of collaborating are being killed or imprisoned under UN flag”. DALLY WORK Oct. 26, under headline “Truth from the TIMES” printed facsimile portion above story describing police station. Associate Press, Dec. 18, President Rhee said today “in view military situation and lack prison facilities” he ordering speed up Red trials and executions. United Press, Dec.17, South Koreans hauled another batch prisoners execution hill and shot them. The Press Reports were so embarrassing for USA and UNCURK(United Nations Commission for the Unification and the Rehabilitation of Korea). Specially called 'execution hill', execution of prisoners by shooting in the Hong Jai Ri was internationally known. The Minister of Justice(ROK), Kim Joon Yun has issued the following statement. “Some persons have been under the misapprehension that these persons were executed causally and illegally, that they were merely Communist synpathizers and hence were executed for th mere holding of beliefs contrary ROK such was not the case.”Korea Government punished the Communist Collaboration(so-called BUYEAKJA) by the Martial Law. Hong Jai Ri accident became know the press reports, Korea Government punished the Communist Collaboration(so-called BUYEAKJA) by the Emergency Law Number One. 31 Dec. 1950, total taken into custody 162,763. Punishment of Communist Collaboration(so-called BUYEAKJA) influenced in postwar Korea.