Abstract:Article 120 of the Interpretation of Criminal Procedure Law in 2021 clarifies the relationship between in-court investigation of technical investigation evidence and out-of-court verification ,and adjusts the out-of-court verification procedure from parallel independent nature to post-complementary nature. This adjustment reflects the requirement of trial-centered reform ,implements the principle of evidentiary adjudication ,standardizes the exercise of the judge' right of out-of-court investigation ,and verification and guarantees the defendant's right to cross-examine ,thus representing a significant progress. However, there are still some problems in the initially improved procedure of investigation and verification of technical investigation evidence :for example, the information contained in the technical investigation evidence presented by the prosecution is too brief and general, the starting standard of out-of-court verification is not clear ,and the objects of out-of-court verification are not effectively distinguished. The continuous improvement of the investigation and verification procedure of technical investigation evidence in the future should focus on new constructive solutions to these problems.