This writing aims: 1) to identify and analyze the basic ideas / basic concepts in the regulation of the lex tempus delicti principle of criminal law in the Criminal Code (the Criminal Code) at this time; 2) identify and analyze the weaknesses of lex tempus delicti in the Criminal Code ; 3) make an ideal reconstruction of the Lex tempus delicti national criminal law based on Pancasila values. Research carried out by m etode research of normative law, ie, against the principles of criminal law in the Criminal Code, particularly lex tempus delicti research comparative law to support the normative research, the study of criminal law of other countries. Research approach methods: hermeneutics, statutory regulations and conceptual. Theoretical implications of research : The new theory is "The Theory of Humanity and Justice in Pancasila ". The value of humanity and justice of Pancasila is interpreted as having provisions containing the principles of the National Criminal Law that establish the limits of the validity of the tempus delicti principle.