In order to effectively evaluate the implementation effect of differentiated parking charge policies, the corresponding evaluation index system in consideration of traffic congestion was set up. Firstly, five aspects including region, time period, parking location, parking violation and road operation efficiency were chosen for index system setting. Then the parking space utilization rate, traffic operation index, on street parking proportion, parking space turnover rate, small car travel proportion, average road speed and other related indicators were included in the index system. The Analytic Hierarchy Process was used to determine the weight of each index, and the comprehensive method was used to determine the evaluation grade, so as to evaluate the implementation of differentiated parking charge policies. Taking a city as an example, the constructed index system was used to evaluate the implementation effect of the city′s differentiated parking charge policies. It is concluded that the implementation effect of differentiated parking charge policies in this city is "good", which further verifies the scientificity and rationality of the evaluation index system.