Pishu content repetition rate refers to the percentage of government documents，media reports，other people’s papers，works，and the author’s own published or partially published report in the body of the report that can be detected by cover book. Originality is one of the most important qualities of Pishu. Pishu content repetition rate detection can be divided into pre-press content repetition rate detection and post-press content repetition rate detection. Based on the pre-press and post-press content repetition rate detection data of 416 types of Pishu of 2020 edition，this report analyzes the content repetition rate results and points deduction of 2020 from the perspectives of overall situation，content classification，research functions，etc. At the same time，it analyzes the content repetition rate of a single report that fails to meet the standard of Pishu，and finds that the main reasons for the high content repetition rate include the same framework every year，the first release of non-authors，citing publicly published resources，and duplication with government work reports and policy documents. The author should strengthen the awareness of reducing the repetition rate，strengthen the originality and the author’s first publish，strengthen the innovation of the report style，and make the think tank report as the decision-making reference.