The Law no. 6638 “The Law about Amending Certain Law with Police Mission and Authority Law, Military Police Organization, Duty and Authorisation Law” was accepted on March 27, 2015 and approved by President with publishing on April 4, 2015 at Official Journal. The Law no. 6638 has come into public agenda as an “Internal Security Package” at Turkish Grand National Assembly. Subjected law which has caused strong difference of opinion in the sight of political parties, lawyers and society, has created a resolution in the form of “provision the public security” and “anxiety of threat the freedom”. The purpose of this study is to express the policy process about this law by means of separate specific phases. In this context, the Law no. 6638 is examined with “process model” which is a kind of public policy analysis method. This study which analysed the law, with phases of arrival, formulation, legalization, implementation and evaluation, includes discussions about subjected phases and presents data to literature and decision makers.