This paper introduces the basic ALOH algorithm, slotted ALOHA algorithm, frame slotted ALOHA algorithm and dynamic frame slotted ALOHA algorithm in details, as well as their basic principle and system effectiveness, and analysis their characteristics. Based on the dynamic frame slotted ALOHA packet algorithm of this paper is presented, labels are grouped according to the number in the algorithm, and dynamic matching optimal frame length, the simulation results show that the improved system has the advantages of high throughput, unrestricted in the number of labels, saving time slots of a frame, and so on.