Abstract: As with complicated engineering geological conditions, the construction of highway tunnel and water culvert often meets various kinds of project accidents. Combined with field data, this paper has discussed the effectiveness of ground penetrating radar (GPR) in the inspection of construction quality of concrete liner of highway tunnel and water culvert and the distribution of reinforced steel bar in the concrete liner. Some examples has showed that GPR technology has remarkable characteristics in locating the defects and hidden dangerous in the liner and in investigating the distribution of reinforced steel bars in concrete liner. Prediction can be provided of the potential geological disasters in highway tunnel and water culvert, and appraise can be made with GPR data.