Rotary steering system is a new high-tech content automatic drilling technology, which plays an important role in improving the accuracy of well trajectory and drilling capacity, reducing the friction of drill string and so on. In view of the hot spots and problems in the current research of rotary guidance system, this paper summarizes and analyzes the background significance, technical combination, working principle and development level of rotary guidance technology at home and abroad, and expounds in detail the key points and difficulties of push type rotary guidance technology. In order to control the future technology commanding point in the field of drilling, finally, the practical engineering value and technology trend of the rotary steering system are prospected and analyzed, which will have practical guiding significance for the development of the rotary steering system and research direction.