The pupose of this research is to know whether or not project based learning is effective to strengthen students’ writing on project report to the students at English Department, Sriwijaya state Polytechnics. This research applied a quantitative approach. In principle, experimental research was conducted to examine the effect of the treatment that has been given to something. It involves three independent variables, namely the Project based learning (X1), guided writing procedure (X2) and the dependent variable is writing a project report (Y). The students were assigned to write report writing paragraphs as in the summative evaluation for pre-test and post-test to collect the data. It was obtained that the average scores of the students’ writing skills with the approaches project based learning and guided writing procedure were 78 dan 74 respectively. It was no doubt that the students’ writing skills with Project based learning was better compared with the approach of guided writing procedure