The duplicate checking rate of doctoral dissertations varies according to the requirements of different schools and majors, but generally speaking, the duplicate checking rate of doctoral dissertations is stricter than that of master's dissertations and undergraduate dissertations. Generally speaking, the duplicate checking rate of doctoral dissertations is generally between 5%- 10%, but the specific requirements need to be determined according to the regulations of different schools and majors. Some top universities have stricter requirements for doctoral dissertations, and the duplicate checking rate may be lower than 3% or even lower. Therefore, for doctoral students, we should strictly abide by the requirements of schools and majors, carefully write papers, ensure the innovation and originality of papers, and avoid copying and repeating other people's content. When writing a paper, you can use the duplicate checking software to check the duplicate of the paper to ensure that the duplicate checking rate of the paper meets the requirements of the school and specialty.