The political theology of  Islamic fundamentalism is a  religious-political movement that wants the total application of Islamic teachings in the political system and at the same time rejects all modern political ideologies. Meanwhile, bayani epistemology is one of the epistemological concepts found by al-Jabiri in expressing  Arabic-Islamic reasoning based on holy texts,  as well as being the basis for criticism of the tendency of textual epistemology in the tradition of Islamic historical literature. Therefore, research on the logical construction of Islamic fundamentalism political theology from the perspective of Muhammad Abid al-Jabiri's bayani epistemology is very relevant. The method used in this research is the literature review method of al-Jabiri's thinking with critical analysis. The results of this study: first, the method of thinking of Islamic fundamentalism political theology is based on text (nash) or literalism-takfirism.  They make holy texts (al-Qur'an and Sunnah) as the only basis for knowledge to arrive at the truth. Their way of thinking revolves around the problem of the concept of text, namely the relationship between lafadz and meaning, Uṣūl and furu ', as well as the position of the text between substance and accident. Second, the bayani dimension really colors the political theology of Islamic fundamentalism, which is textualistic and rejects all other epistemologies such as irfani and burhani. Based on textual reasoning, the theological reasoning of Islamic fundamentalism rests on three elements; (1) The dichotomous-dialectical paradigm, which sees everything in two opposing poles,  such as black-and-white,  right-wrong, and good-bad.  (2) Islamic reasoning, which is politically-theocentric, namely a thought that understands that Islam and the state are integral and Islamic law must be applied in the divine political order. (3) Political jihad as Jihād fī Sabīlillāh, the jihad referred to here is war, both mental and physical. Jihad must be carried out to fight for an Islamic state as well as to fight against the enemies of Islam, both from within and from outside. This jihad is political in nature, but because it is based on religion, this jihad is considered as Jihād fī Sabīlillāh, which is a form of struggle in the path of Allah.