With the increasing popularity of IoT application technologies, one of the key technologies, called the radio frequency identification (RFID) technology, has been applied to more and more application scenarios in various fields. The electronic tickets apply RFID technology to traditional tickets, which makes the traditional tickets have the characteristics of being storable and identifiable as well as verifiable, bringing a great deal of convenience and efficiency to people’s daily life. Although, RFID systems in the application of electronic tickets still face many potential security risks, such as privacy leakage. To solve the security problems in the application of electronic tickets, an ultra-lightweight RFID security authentication scheme is presented in this paper. Compared with some schemes that use complex cryptographic algorithms, this scheme adopts simple logic operation and timestamp synchronization upgrade mechanism, which can effectively resist asynchronous attack and replay attack, and besides it can effectively prevent information leakage. At the same time, the method that the time stamp matches the label information in the database in this scheme greatly improves the efficiency of information searching in database. Through the analysis of security and efficiency, and the performance comparison and simulation, the proposed scheme has higher security and efficiency than some existing schemes.