STIBA (Arabic Language College) "X" is a high school that teaches Arabic and the Qur'an. STIBA "X" aims to produce superior, competitive and professional educators in the Arabic language field. STIBA "X" is a school that has high competition and implements a drop out system to maintain the quality and quality of its students. This drop out system makes students feel worried and anxious in their studies. Based on the results of interviews, it was found that STIBA "X" students had moderate to high anxiety. The purpose of this study was to examine the effectiveness of iCBT therapy in reducing anxiety in STIBA "X" students. The subjects of this study were 20 STIBA students who had moderate and high levels of anxiety. Anxiety levels were measured using BAI (Beck Anxiety Inventory) with a reliability of 0.875. The 20 students were divided into an experimental group and a control group using a randomized technique. The research data was taken using the pre-test and post-test methods. Hypothesis testing was carried out using the independent paired T-test method. From the results of the independent paired T-test, a significance result of 0.000 was obtained with a mean difference of 12.50, this shows that the iCBT therapy given is effective in reducing anxiety in STIBA "X" students.