Multi-core fiber with the unique advantages in space division multiplexing has attracted more attention in many fields. As a new technology of optical fiber sensing, multicore fiber shape sensing technology can be used to detect the three-dimensional shape and the position without other visual aids. Meanwhile, this technology shows the characteristics of compact structure and easy integration without electromagnetic interference, which can be applied in aerospace, industrial machinery and building structure monitoring, interventional therapy tracking and other fields. This article reviewed the latest progress of multicore fiber shape sensing in recent years, and the key technique of shape sensing technology, are covered in detail. Finally, challenges and future perspectives of multi-core fiber shape sensing in practical applications are discussed.