Students at SMPIT Madrasatul Quran boarding school memorize verses of al-Quran, memorize Arabic vocabulary, learn Arabic grammar and learn Arabic texts. This process will be a good attempt to improve students' ability to read and understand Arabic texts. In reality, however, some students are not able to read and understand Arabic texts well, as there are errors in "makhrajul huruf", errors in "late rendering", errors on "stop places while reading texts" and are unable to " explain the meaning of the text read". Therefore, the researcher wanted to study the application of cooperative learning method with Jigsaw model to improve the ability of SMPIT Madrasatul Quran boarding school students to understand Arabic texts. The purpose of this study is to know the process of teaching students, students' responses to learning and to know the efforts of teachers in applying cooperative learning methods with Jigsaw model to improve the ability of SMPIT Madrasatul Quran boarding school students in understanding Arabic texts. The approach of this research is procedural research method. The research results that cooperative learning method Jigsaw model is effective to improve the ability of SMPIT Madrasatul Quran boarding school students in understanding Arabic texts. As a proof that the value of students in the first round is 66.89 (accepted). In the second half was 72.58 (acceptable). In the third round was 82.58 (good). In the fourth round their value increased to 86.20 (good). And also after observing learning by using cooperative learning method, there is a change in teaching and learning process. And the efforts of researchers in finding solutions to student problems have increased their competence and courage to read and understand Arabic texts