This article figures out ideological biases in Abū Rashtah Book’s, al-Taysīr fī 'Ulūm al-Tafsīr: Tafsir al-Baqarah. As a figure of ḥizb al-taḥrīr, Abū Rashtah's interpretation strengthens his organization's ideology and to oppose the ulama's interpretation. This article questions how the al-Taysīr methodology was used by Abū Rashtah for interpreting al-Qur'an and how the biases of Abū Rashtah's interpretation in his book. By using thematic writing techniques on khilāfah verses and using descriptive analysis methods, This research concludes that the method of interpretation applied in his book prioritizes linguistic analysis and the use of reason. Through this method of language based on reason, it was found that there were ideological biases. One of them is the persuasion of the enforcement of the khilāfah Islamiyyah system when he interprets the QS. Al-Baqarah: 30. Abū Rashtah is of the view that this verse is the normative basis for the enforcement of the khilāfah system. Apart from the above verse, the invitation to enforce the khilāfah system can also be found in the QS interpretation of al-Baqarah: 105. Abū Rashtah believes that the Khilāfah Islamiyyah will soon be established on the face of the earth according to Allah's promise.