Critical thinking skills and spatial reasoning are important aspect in human life. On the other hand, currently, implementing augmented reality in many fields be a trend, including in education field. This study aims to explain how to improve critical thinking skills and spatial reasoning with augmented reality in mathematics learning. The method used in this research is literature review. The data obtained from scientific journals, conference proceedings, and other relevant sources. The results show that to improve spatial reasoning can be done by utilizing its features that can develop confidence of learners, facilitate student-centered learning, create problem solving, and create interactive learning. Besides that, spatial reasoning can be improved by designing dynamic objects with AR. Dynamic objects permit learners to view objects from different sides. Therefore, active learning can be promoted.