China is home to more than 20% of the world’s population and has achieved major advances in human milk research. Non-Chinese speakers were unable to access some of the data that had been released in Chinese. There was also no complete review of crude protein and amino acid levels in Chinese population human milk. The purpose of this systematic review was to collect data on human milk crude protein and amino acid levels in the Chinese population. Following a search for and screening of original research publications in both English and Chinese, 23 articles published between 1987 and 2019 were discovered. The data was categorised into nine lactation phases. Crude protein and amino acid contents dropped progressively during the first 60 postpartum days and thereafter remained rather stable. The concentrations and dynamic changes of crude protein and amino acids in this population were comparable to those seen in other groups. Due to the limited data provided, the longitudinal changes in free amino acids were less apparent. Several common flaws were discovered in these investigations.

The work provided the most thorough review of crude protein and amino acid contents in human milk in the Chinese population, and it improved understanding of Chinese babies’ protein and amino acid intakes and needs.