Investigation of the effects of public financial management policies on the accounting system used by the government of South Sudan was/is the goal of this study, along with learning how the National Ministry of Finance and Planning is handling these implications. Data were gathered by administering questionnaires to respondents around the state and conducting interviews. The survey was created using a 5-point Likert scale. To accomplish the research aims, the researcher employed descriptive and explanatory research designs. Additionally, frequency analysis was employed in the study. The National Ministry of Finance and Planning in Juba, South Sudan, used 35 respondents as the population size, and 32 of them were chosen as the sample size utilizing the Krejcie and Morgan Table 1970 sampling techniques. The replies obtained from the disseminated questionnaires were utilized to assess the data for this study, which was mostly based on secondary sources. The study discovered that effective public financial management on the government accounting system is significantly influenced by budgeting, accounting systems and reporting, internal control systems, auditing, and leadership. Based on the study's findings, the researcher came to the conclusion that internal and external budgetary control are second in importance to the political will of the country's leadership in ensuring good public financial management. The researcher advised the Ministry of Finance and Departments to comprehend how important each of these aspects is to the overall success of public financial management. Finally, the researcher suggested that other researchers, especially administrators in the public sector, conduct additional research.