The Grand Canal is a linear cultural heritage corridor composed of natural landscapes and cultural elements that provides important ecosystem services. The study of public perceptions of cultural ecosystem services is essential for intuitively linking ecosystems to human well-being, and is an important guide for canal planning and improving the quality of services. Taking the Suzhou section of the Grand Canal as an example, local residents' and non-local tourists' perceptions of the canal's cultural ecosystem services were studied using importance-satisfaction analysis. From the results of public perception, there is a significant difference between local residents' and foreign tourists' perceptions of cultural services, and the four cultural ecosystem services of education and knowledge, cultural heritage, social relations and sense of place should be emphasized.Based on this, four enhancement strategies are proposed for the cultural ecosystem services with low satisfaction in the public perception results, which include popularization of canal cultural heritage and nature education, building the local characteristics and culture of Suzhou canals, increasing the number of special activities to promote public socialization, and expanding water excursion routes by connecting cultural heritage corridors.The study shows that public perception studies can effectively complement the canal planning process and that the importance-satisfaction analysis method is generalizable and easy to apply. Keywords: Canals; World Cultural Heritage; Public perception; Cultural ecosystem services