Various countries in the world today are threatened by money laundering as a transnational crime as know borderless crimes. This is because the impact of money laundering is not an ordinary impact. The crime of money laundering has a huge impact disrupt the stability of the economy and social life, and even damage the world economic order. However, various legal problems in dealing with money laundering often occur in Indonesia. With these various problems, it shows that Indonesia needs a legal reformulation related to money laundering as classified as a transnational crime. Based on this background, this research will be discuss the problems is how can money laundering be classified as a transnational crime and what are the problems with it’s law enforcement and how is legal policy of money laundering as transnational crimes reformulation in Indonesia. This study uses a descriptive normative research method with a qualitative approach. The results research show that the idea of reformulation in law enforcement of money laundering as a transnational crime in Indonesia is through the reconstruction of Mutual Legal Assistance or MLA between the Indonesian government and various countries in the world and the application of other international instruments, such as extradition and confiscation. Then regarding the problem of money laundering in law enforcement, it is necessary to reformulate the authority of Corruption Eradication Commission or KPK to prosecute money laundering crimes originating from the criminal act of corruption because the Anti-Money Laundering Law has not yet clearly regulated the law enforcers who are authorized to carry out prosecutions for the Crime of Money Laundering. So to overcome this law enforcement problem, it is necessary to reform the money laundering law.