With the continuous improvement of blockchain depository technology, its application advantages in digital music infringement cases in China are becoming more and more prominent. Blockchain depository technology in digital music infringement cases has the application advantages of effectively proving the focus facts, reducing the cost of proof for plaintiffs, and improving the efficiency of court trials. Nonetheless, blockchain deposit technology still exists in specific practice, such as the problem of data authenticity before entering the chain, the problem of judging the originality of digital music, and the problem of judges' professional level being difficult to adapt to. Based on this, the optimisation path of blockchain deposit technology in digital music infringement cases can be fully utilised by compressing the entry time, increasing the number of times of entry, exploring the mode of "blockchain technology + expert appraisal", and perfecting the relevant rules of evidence.