The purpose of this study is to analyze public order problems in the early stage of Korean unification, estimate the types and size of police manpower needed to tackle these problems, and suggest ways of securing the manpower. 20)This paper anticipated, as crime that can increase rapidly in North Korea, riots,terror and murder, arson and destruction of main national facilities, plunder and burglary, slave trade, etc. And, as the urgent and top-priority measure that South Korean police authorities ought to take, this paper indicated the prevention of riots,arson, destruction, terror, murder, plunder in North Korea, the management of North Korean people flowing into South Korea, and the reconstruction of North Korean police stations. Finally, it estimated the police manpower necessary for these measures as 220,000 riot squad and police officers. And it suggested that at least half of them should be prepared and trained in advance by South Korean police authorities and the rest of them be required to employ North Korean people after North Korean government starts to collapse.