Start your abstract here Knot semantic logic theory is a new idea to explain the symmetry structure of a literature. The methodology used in this research is the combination of Theme-Rheme framework, Paltridge’s classification of thematic progression and symmetry diagram mapping. The results of this research are the establishment of knot semantic logic theory and the application to analyze the symmetrical structure in Surah Al-Kahf. After applying this theory to Surah Al-Kahf resulting that the chapter contains 9 groups form symmetrical structure. The first theme on this Surah is about Believers, non-believers and consequences connected to the last group with the similar theme. The theme of the second group is about self-quarantine mirrors to the second to the last group about lockdown. The third theme is about Patience and its reward related to the seventh group. The test of wealthyis the theme of the fourth group which mirrors to the sixth group talking about provision as a sign. Finally, the fifth group as the central of this chapter states that Quran has provided many lessons and guidance for human beings. Surah Al-Kahf is knot chapter with a mathematical symbol :