This article aims (1) to determine the ability of students to memorize Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City before using the Al-Qasimi Method. (2) to determine the ability of students to memorize Al-Qur'an in Manarul Hasan Islamic Boarding School, Banjar City after using the Al-Qasimi Method. (3) to determine the ability of students to memorize Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City before and after using the Al-Qasimi Method. This type of research is a quantitative research with educational and psychological approaches. The population in this study were 20 students in class 2B of the Manarul Hasan Islamic Boarding School, Banjar City, with a total sample of 20 students in class 2B of Manarul Hasan Islamic Boarding School, Banjar City. The sample was taken by using purposive sampling technique. The instruments used in this study were observation and tests. The analysis technique used is descriptive statistical analysis and inferential statistical analysis. Based on data analysis using descriptive statistics, the following results were obtained: (1) the ability of students to memorize the Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City before using the Al-Qasimi method obtained an average value of 63.25 (2) ) The ability of students to memorize the Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City after using the Al-Qasimi method obtained an average score of 85 (3) There is a difference in the ability of students to memorize the Qur'an in the ability of students to memorize Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City. This is evidenced by the difference between the pretest and posttest scores carried out by the researcher. Based on data analysis using SPSS version 20, it is known that the Sig. (2-tailed) of 0.000 <0.05, it can be concluded that there is a significant difference between the scores of the students' ability to memorize Al-Qur'an at the Manarul Hasan Islamic Boarding School, Banjar City between before and after using the Al-Qasimi method.