This paper provides a systematic review of the application of digital technologies in the resource utilisation of canal engineering spoil. It analyses the current challenges in spoil disposal, including large volumes, complex compositions, and prominent environmental pressures. Then, it focuses on discussing technological progress in key areas such as digital excavation, safety control during storage, intelligent processing, and low-carbon management. Moreover, by combining the Pinglu Canal project and the European “Dragon Plan”, this paper summarises the experiences where digital technologies enhance the efficiency and environmental benefits of spoil utilisation. It also identifies persistent challenges in standardisation, cost control, and systemic coordination, and offers corresponding recommendations to support efficient and sustainable spoil resource utilisation in canal engineering.