The patent application pre-examination mechanism is an important measure to promote the rapid and coordinated protection of intellectual property rights. This mechanism can greatly shorten the patent examination period and fully stimulate the innovation vitality of enterprises and institutions. Combining with the practice of patent application pre-examination, the process of the pre-examination mechanismis outlined , the pre-examination mechanism and priority examination system is analyzed, discusses the impact of the pre-examination mechanism is discussed, and it is proposed to strengthen the pre-examination mechanism to promote the development of regional traditional industries, broaden the scope of the administrative area served by the pre-review mechanism and improve the compliance and standardization of the pre-review mechanism.