Objective: To identify and analyze the infrared fingerprints of fruits of Juglans mandshurica samples from different areas of Heilongjiang province. Method: One-dimensional IR spectrum combined with the second derivative spectrum

as well as similarity comparison software were used to process the IR fingerprints of fruits of J. mandshurica from 13 origins and their main active ingredient juglone. Result: The fingerprint characteristics of fruits of J. mandshurica were identified and their difference between different origins were studied. The content of chemical composition in fruits of J. mandshurica was higher in Jixian county

Tangyuan county

and Hailin

but lower in Harbin and Huanan county. Conclusion: For fruits of J. mandshurica in different origins

infrared fingerprint analysis is an effective and quick method for identification and analysis.