This study aimed to investigate the effect of using some proposed AI activities on enhancing EFL writing fluency for the preparatory stage students in Distinguished Governmental Language Schools. Participants of the study were 33students in preparatory three from Hassan Abu Bakr governmental language school in the academic year 2021– 2022. The researcher`s instruments included writing fluency components checklist, a rating scoring rubric and a pre/post writing fluency test. Participants were taught through using some relevant AI applications designed by the researcher that included Minecraft game with grammarly mood, Semantris vocabulary AI game and virtual reality in AI mood that enabled the students to practise using English in vivid situations. Participants' scores on the pre and posttest were statistically analyzed using T- test and effect size. The researcher also used a qualitative analysis of the students' writing fluency level. Results of the study revealed the positive effect of using AI applications on enhancing third preparatory stage students` writing fluency.