Abstract: In order to improve the performance and life test technology of heavy-duty hub bearings, a load spectrum conforming to the durability test of heavy-duty hub bearings produced by a company was developed. According to the actual driving state of the heavy truck, the main structural characteristics of the heavy-duty wheel bearing, the actual working condition load, the loading condition and the tire load were elaborated, and the relevant data collected by the new heavy-duty wheel hub bearing simulation test machine was utilized to determine the proportion of each driving state. For example, the heavy-duty trucks with matching hub bearings were used to analyze the characteristics of domestic road conditions, and develop the durability of the heavy-duty trucks according to the driving conditions of heavy-duty tires in each cycle. The test load spectrum, based on the comparison of test results and customer usage in three years, shows that the study has practical guiding significance for the evaluation of the performance of heavy-duty hub bearings, and has been applied in the routine test of durability test of heavy-duty truck bearings.