Writing is one of the most important ways of transmitting thoughts to others. Each writer chooses a style that suits with his desired goals, to influence readers 'minds, but it is possible, and perhaps often, despite of the similar purpose of writing, there are differences in the styles used by the authors. The style plays an important role in transmitting the content and achieving the purpose of writing, because the readers’ s desire to read the text, depends a lot on the proper structure of the sentences used. Stylistics is one of the most important modern trends and has various subfolders, including: Statistical Stylistics. This trend is takes into account the quantity and number of lexical phenomena in the text and builds its rulings based on the results of this statistics. in other words, it takes advantage of the quantum to obtain the quality. With the help of Statistical Stylistics’ s studies, we will able to distinguish between different styles, including: scientific, literary, rhetorical and. . . . . . This research deals with the study of Statistical Stylistics in the NahjolBalaghe and the SahifehSajjadieh. We Selected the letter 74 and the prayer 38 as models and compared their style according to Bozeman and Johnson’ s theories, during the descriptive-analytical and statistical methods. We concluded, according to Bozeman's theory, that the style of the SahifehSajjadieh is closer to the literary style, and the style of the NahjolBalagheh, is closer to the scientific style, and according to Johnson's theory, that the Vocabulary Richness of the SahifehSajjadieh is more than the NahjolBalagheh, but There is not much difference between them, and this difference was Because of the influence of social conditions.