It is easier to cause safety accidents and decline the tourism experience of tourists that the tourists in the attractions are overcrowded. Planning tour route for tourists is an effective solution of guide accounting. A concept of congestion degree was proposed to describe the congestion level of attraction and the function of the tourism experience utility was proposed. Taking into account the service time of attraction, the budget of the time and cost, the optimal model of the tour route planning was established based on tourism experience utility maximization. In addition, the ant colony algorithm was developed to solve the mode. Then the model and algorithm were verified by an example. The results indicated that the attraction congestion had great influences on the tourism activities time and the tourism experience utility of the tourist. To provide tourists with the best tour route, the attraction congestion should be considered in the tour route optimization.