Pavement structure and Bridges, DAMS and other civil structures are different. Its service life is relatively short. After a period of time, the road will be damaged, resulting in a decline in pavement performance. It affects the driving safety and comfort. It will also affect residents along the way. Therefore we must take appropriate repair method to restore the use of the pavement quality. The choice of suitable repair method depends on the accurate evaluation of pavement condition, among which the evaluation of pavement structure's bearing capacity is an important part of pavement condition evaluation.