Abstract: The tractor plays an important role in China’s modern agricultural production,and in the actual use process,the tractor is also easy to be affected by many factors and break down. Abnormal vibration is one of the characteristics of tractor faults. Analyzing the fault characteristics of tractor abnormal vibration can help fault analysis and location,so as to improve the efficiency and quality of tractor fault maintenance. The research on the vibration characteristics of tractor is introduced in detail,the detection method of vibration characteristics is explained,and an example of typical abnormal vibration is analyzed.