In order to study the traction characteristics of lubricants under the working conditions of aerospace bearings,a testing machine was developed to test the traction characteristics.The main structure of the testing machine was introduced,as well as its main components and functions of the power system,loading system,lubrication system,and measurement system.The key components of the testing machine were analyzed and checked to ensure the reliable operation of the testing machine.A confirmatory test was carried out on this test machine,and the test results were compared with those of similar foreign test machine.The results show that the testing machine runs stably,meets the specified functional requirements,and the measured data are accurate and reliable,which can provide reliable data support for the dynamic analysis and structural design of aerospace series bearing products.