To examine the rationality of the existing overweight vehicle standards in China, American bridge limit load analysis method is used for China's typical vehicle calibration. First of all, on the basis of American bridge limit load formula, the basic form of systematic analysis of the bridge limit load formula and using method of typical vehicle. Secondly, this paper introduces the current Chinese standard overweight vehicles. Finally, this paper selects the study of highway bridge vehicle load standard of six kinds of typical vehicle, using American bridge method for calculating the limit load formula of China's typical vehicle for calibration.Results show that the overweight vehicles standards has many shortcomings, such as: standard overweight vehicles in our country is not standard, and determined on the basis of not clear of overweight vehicles, defining the standard is not unified; Typical vehicle axle load limits and car cargo gross weight limit is higher than by the bridge limit load calibration formula of axle load limits to cargo gross weight limit of the car. This paper suggest consider overrun vehicle standards adopted by the Chinese wheelbase parameters of vehicle load limit.