Scientific method was necessary for road decisionmaker to select high costeffect ratio pavement structure scheme. According to the fact that many uncertain knowledge and information existed in the process of evaluating the expressway asphaltpavement structure schemes， an evaluation model of pavement structure schemes based on uncertainty measurement was put forward;This method implemented ordered division of assessment space，and could recognize and rank different schemes by comprehensive measurement matrix of multiple indexes. three typical design programs of expressway asphalt pavement structure were evaluated by that model.It is shown that the assessment can objectively reflect the comprehensive performance of asphalt pavement structure ，which provides a new method and way for evaluation of pavement structure schemes.