ABO3-type perovskite oxides have played a significant role in the fields of sensors, capacitors and electrochemical memory devices for many years due to their excellent electrical properties and the controllability of A/B sites. In recent years, the miniaturization trend of electronic devices has put forward higher requirements for the performance of ABO3-type perovskite oxides. Therefore, it is urgent to develop new perovskite oxide materials with excellent performance. High entropy transformation is a new idea. In ABO3 perovskite oxides, the two active sites A and B can be utilized to construct high configurational entropy, thereby achieving more excellent comprehensive properties such as electrical, optical, thermal and mechanical properties. This article summarizes the research progress on ABO3 type high-entropy calcium titanate oxides in recent years, and elaborates on the latest achievements in its fields such as dielectric energy storage, piezoelectric properties, chemical energy storage, catalytic action, and mechanical characteristics. At the same time, the article analyzes the oxidation mechanism of this type of material, discusses the main problems existing in current research, and looks forward to its future development direction.