The present study was an attempt to investigate the relationship between EFL persuasive writing and critical thinking skills among student teachers at Faculty of Education. The design of the study was based on the relationship between EFL persuasive writing and the development of EFL critical thinking pre – posttest. The participants of the study consisted of 30 students of one group and was selected randomly from third year English section student teachers at Faculty of Education. The instruments of the study were: An EFL persuasive writing skills checklist which was divided into 7 main skills ,25 sub-skills , an EFL persuasive writing test which were designed and validated to be used as a pre-posttest , a rubric for assessing EFL persuasive writing skills and EFL critical thinking skills checklist which was divided into 6 main skills , 19 sub-skills, an EFL critical thinking test which were designed and validated to be used as a pre-posttest. The researcher used one group. The group of students were studied EFL persuasive writing skills and the ability to stimulate EFL critical thinking skills . The implementation of the study was in the second term of the academic year 2021-2022. The researcher applied the tests as piloting on other students in the same section and the same term. The findings of the study revealed that EFL persuasive writing skills were developed then, the result the development of EFL critical thinking skills.The findings confirmed the that there is relationship between development of EFL persuasive writing and