Mobile short video has become a popular application software in China and an important carrier of tourism image display and communication. It has become a fashion for tourists to upload short videos of their travel experience. Taking Jizhou Island as an example, this paper collects comments from network users for content analysis, and studies the tourism image presentation and communication effect of Jizhou Island in China's hottest short video application software (TikTok) through the quantitative analysis of short video theme distribution, short video playback volume, point praise volume and share volume. The research shows that the short mobile video presents and disseminates vividly the island landscape, delicacies, folk customs, seagirls, forest trains and accommodation, Hotel services, shopping and other tourism images of Jeju Island, and displays the tourism image of Jeju Island in an allround, multi-angle and interesting way. TikTok shot videos generate content for the user's actual close-to-reality travel experience with high credibility, therefore it has a good e-word-of-mouth effect. Short video TikTok has a good communication effect on the tourism image of Jezhou Island. The tourism marketing management department can realize targeted marketing for tourism image to the users based on the content uploaded by the users of the short video platform.The research conclusion has certain guiding significance for improving the effect of tourism image communication in Jizhou Island.