Most Australian state and territory governments have healthy food provisioning policies targeting availability of unhealthy food at the retail level, and sustainability policies promoting a life-cycle approach to procurement. However, it remains unclear if health and sustainability are important considerations in awarding contracts, and whether these high-level policies are implemented into supplier contracts. A political economy analysis framework has been developed to prospectively identify and explain barriers and enablers to policy implementation. Using food procurement in Queensland and South Australia as case studies, the political economy analysis seeks to understand the structural and contextual factors, bargaining processes, stakeholders, and incentives and ideas surrounding food procurement. It involves a desktop and content analysis of existing policies and food contracts, and key informant interviews with government and industry stakeholders. Participants will be targeted across different departments (e.g. health, environment, treasury) and in varying roles from policy design, contract management and food service, and industry suppliers in different food and drink categories (e.g. meat, packaged foods, beverages, fruit & vegetables). Participants will be recruited using purposive sampling. Thematic analysis of interview transcripts will be undertaken, informed by the political economy analysis framework. The study will identify current food procurement policy implementation barriers and enablers, including why high-level policies aren't embedded into contracts, mechanisms for achieving policy coherence and future opportunities for addressing barriers and incorporating socio-economic, public health and environmental considerations into purchasing practices. Ultimately, the study will achieve impact by informing a whole of government approach to health and the environment by elevating the priority of health and sustainability in procurement (short term), increasing the availability of healthy and sustainable foods (medium term), and improving health and environmental outcomes (long term). To our knowledge this is the first political economy analysis of food procurement in Australia.