The correlation of reading comprehension and mathematics achievement of students are significance, due to dominant students have difficulty in working on narrative or story questions of mathematics which is caused by their lack of reading comprehension ability, they are  unable to comprehend what is known and what is asked from the text or questions. This study aims to analyze the role of reading comprehension in mathematics achievements. The participants of this study are ninety-six pupils enrolled in three senior high school mathematics and sciences classes in the XI grade. This study uses quantitative methods and uses 10 questions in each mathematics and reading assessment which will be analyze by using PISA Levels and SPPS. The findings of this research are the Top performance is obtained by the A class with an average of 2385, Average performance is  B class with an average of 1875, and Low performance is C class with an averagae of 1400. Based on the findings, it shows that the class who has high performance on reading also has good performance on math, A class students has high ability in reading comprehension than other two classes due to most students comprehend with the english text because they are rich with vocabularies, and according to  SPPS Stastistic result, reading comprehension and mathematics achievement have positive correlation with .000 significance and >.610 pearson correlation which shows that there is the correlation between reading comprehension and mathematics achievement.