  Supply chain management (SCM) plays a vital role in the global economy, as
evidenced by recent COVID-19 supply chain challenges. Traditional SCM faces
security and efficiency issues, but they can be addressed by leveraging digital
twins (DTs) and blockchain technology. T he combination of blockchain and DTs
can refine the concepts of both technologies and reform SCM to advance into
Industry 4.0. In this paper, we provide a comprehensive literature review of
the blockchain-based digital twin (DT) solutions to optimise the processes of
data management, data storage, and data sharing in SCM. We also investigate the
key benefits of the integration of blockchain and DTs and examine their
potential implementation in various SCM areas, including smart manufacturing,
intelligent maintenance, and blockchain-based DT shop floor, warehouse, and
logistics. Finally, we put forward recommendations for future research
directions.
