Abstract: Multi-card recognition is an important part of UHF RFID system, and its recognition effect directly affects the ability of system identification. With the development of Internet of Things, multi-card recognition in most UHF radio frequency identification systems is through system and Intelligent coding technology to achieve, through the existing radio frequency identification of security technology and research, and low-power ultra-high frequency electronic tags for hardware and software design, and complete the antenna and RF circuit and label manufacturing process, In order to achieve ultra-high frequency radio frequency identification system in the multi-card recognition. However, this method has the problem of complicated calculation and difficult to be widely used.In this paper, a multi-card identification method based on multi-server system is proposed. The high frequency radio frequency identification system is analyzed and the energy in the UHF RFID system is studied. And data transmission mode, so as to complete the ultra-high frequency radio frequency identification system anti-collision analysis, on the basis of the establishment of multi-server system model, and the design of the Internet environment UHF radio frequency identification system packet encryption algorithm, Identify the conflict in the system, complete the anti-collision analysis, and finally through the recognition system to identify the card selection, complete the Internet environment under the ultra-high frequency radio frequency identification system in multi-card recognition. Experiments show that the proposed method can improve the storage capacity of the system, realize the long distance barrier reading, has a wide range of use, good security and other advantages, and has good use value.