[Purpose/significance] Under the premise of digitization, this paper recognizes and revises missing errors of Index to Chunqiu Jingzhuan, whose compilation quality is reviewed and analyzed based on quantitative data. This paper shows the compilation quality of the great works of ancient Chinese classics index Sinological Index Series in the manual age and reveals the value of the printed form full-text index of ancient books in the digital age.[Method/process] The scriptures, biography and all index entries of Index to Chunqiu Jingzhuan was counted by digitization. Comparing them item by item was to find out and correct the errors and omissions, record and count the types and numbers of errors and omissions, and analyze the overall compilation quality.[Result/conclusion] There are few missing errors in Index to Chunqiu Jingzhuan, and the entry error rate is only about 1 in 10,000. The compilation quality can be called the pinnacle of the hand-crafted era, it deserves the great reputation among academic community and can be used as a high-quality foundation for digital corpus.