There are requirements for patent ranking in doctoral application. In doctoral application, patent ranking is usually regarded as a part of scientific research results. Generally speaking, the higher the patent ranking, the greater the contribution of doctoral students in the patent research process, and the greater the positive impact on the application. Patent application and authorization are considered to be one of the important scientific research achievements in the field of engineering technology. In this case, doctoral students need to clearly state patent information and their own contributions, such as the specific content and background of the patent, the role and contribution in patent research, etc. In addition, it is necessary to provide relevant patent application materials, authorization certificates and a list of patent inventors.