Abstract: 【Objective】 The body weight data of cattle is an important index to measure the healthy growth and development of cattle and weighing cattle regularly is also the basic work of fine breeding. 【Methods】 At present, the methods of obtaining beef cattle weight in large and medium-sized beef cattle farms in China are mainly through the weighbridge with fence, body size estimation and measurement, and static weighing of beef cattle by Baoding frame. Static weighing not only consumeed a lot of labor, but also made beef cattle produce stress reaction, which led to the decrease of beef cattle feed intake and affects the production efficiency of beef cattle breeding. Domestic experts and enterprises continued to deepen the research of beef cattle automatic dynamic weighing technology, the goal was to achieve the full range of beef cattle weighing barrier free and complete automation; at the same time, it was also the urgent demand of major beef cattle farms. In view of the above problems, this paper developed a beef cattle automatic dynamic weighing system. It was mainly composed of main mechanical structure framework, RFID radio frequency identification system, power supply system, control system and data transmission. 【Results】 Firstly, it can realize the whole process barrier free breeding of beef cattle, and monitor the beef cattle weight information under the natural walking state, effectively avoid the beef cattle to produce stress reaction; Secondly, the weighing efficiency is high, and the system locks the effective weight data of beef cattle between 2 and 4 seconds. The average time for each cow from entering the channel to the end of weighing is within 10 seconds. 【Conclusion】 The error of beef cattle passing through the weighing platform is less than 0.5%, while that of beef cattle is less than 0.2% in the state of walking pause and steady walking.