The purpose of this study is to analyze: 1) How are political parties related to public policy? 2) Why is there a problem with the authority of political parties in influencing public policy?. The research method used is normative juridical with a statutory approach, concept approach, and case studies. The results showed that: 1) In the formulation of public policies by political parties through executive and legislative bands, coordination, communication, consolidation, solidity and transparency are needed. Coordination is carried out with the aim that the policy must be synergistic so that the policy becomes a shared responsibility. 2) Improvements in Policy-Making Institutions Supervision carried out by political parties to parliament, has a strategic role in formulating national policies, but parliament as a representative democratic system cannot run well without the presence of political parties that are intermediaries between political elites and constituents, so this can be an obstacle between people's aspirations and party interests. Amendments to Law Number 17 of 2014 relating to party intervention against parliamentarians, Supervision carried out by political parties to parliament, need to be revised and realigned. Because it will provide a safe space and focus on public policy making in order to overcome problems that occur in society.