The confidentiality examiner marks the patent application file that needs to be kept confidential, establishes a confidential file location status card, processes it in the computer system, and records the patent application before making a decryption decision. To manage. The preliminary examination and substantive examination of confidential patent applications are conducted by examiners designated by the Patent Office of the State Intellectual Property Office. The preliminary examination is conducted according to the same standards as general invention patent applications. Confidential patent applications that pass the preliminary examination will not be published. If a substantive examination request has been made and the substantive examination fee has been paid, the substantive examination procedure will be entered directly. Substantive examination is conducted on the same basis as general invention patent applications. If no reason for rejection is found after substantive examination, a notice of grant of patent rights will be issued, and the confidentiality examiner will notify the applicant to go through the patent registration procedures. The authorization announcement for a confidential patent application only publishes the patent classification number, patent number, patent application date and authorization announcement date.