This research aims to describe the implementation of self-directed learning (SDL) for the tenth-grade students of SMK PGRI 2 Tanah Grogot, to analyze the effectiveness of the self-directed learning (SDL) strategy on reading comprehension skills for the tenth-grade students qfSMK PGRI 2 Tanah Grogot and to analyze the student's motivation after the application of the self-directed learning (SDL) strategy of reading comprehension skills for the tenth-grade students ofSMK PGRI 2 Tanah Grogot. This research uses experimental investigation methods. The target population and sample of this research are all tenth-grade students of SMK PGRI 2 Tanah Grogot for the academic year 2022/2023. The total sample is 14 students. The findings of the research showed that the efficiency of using self-directed learning strategy can be known from pre- and post-test comparison findings. It can be seen from the acquisition of the means of the pre-test was 43.1429 and the post­test was 85.4286 which was carried out on the same 14 samples. The questionnaire's findings answers showed that student motivation increases after carrying out the learning process. It can be seen from the frequency distribution of questionnaire statements using the Like rt Scale. Based on the findings, it is possible to deduce that the use of se!f-directed learning strategies improves students' reading comprehension skills and motivation.