Safeguarding ecological security is the basis for healthy development of the environment, economy, and social system of tourism towns. In recent years, the fact that the development and construction of tourism towns have become a leading direction of new urbanization construction has been a widespread concern. The town of Erdaobaihe is a typical tourism town. With the rapid development of tourism, the ecological environment is facing great pressure and the threshold of ecological security carrying capacity of tourism towns has been reached. This has seriously affected the self-integrity and sustainable development of the tourism town ecosystem and even threatened its ecological security. Targeting the problems of information shielding and subjectivity in current ecological security evaluation, an ecological security evaluation index system was developed based on the DPSIR-EES model. The weight was determined by the entropy weight and mean square difference methods, and a matter-element analysis model was introduced to evaluate the ecological security level, analyze the trend of the ecological security level among various indicators, and realize visualization and analysis of the ecological security evaluation and evaluation results for Erdaobaihe from 2010 to 2019. The research produced the following results: (1) From 2010 to 2019, the ecological security level of Erdaobaihe changed constantly from the insecurity level to the security level, with a prominent increase after 2016. (2) Based on the level of the DPSIR-EES, GDP growth rate, social security construction level, and energy conservation and environmental protection are the three most prominent indicators; based on the analysis of the element change of the DPSIR-EES evaluation index system, the fluctuation of the economic pressure level was obvious. The influence, social, and economic levels are the main constraints for the healthy development of ecological security in Erdaobaihe. The combination of the multi-dimensional index and the matter-element analysis model could not only provide comprehensive quality information and reflect the stability of the evaluation object but also directly reveal the differentiation of each single evaluation index to overcome the subjectivity of human influence in the process of assessment and improve the accuracy of ecological security assessment, thus providing a scientific basis for the next stage of ecological security decision-making in Erdaobaihe. The next stage of work should focus on environmental development and protection, actively taking response measures to compensate for the negative impacts of production and life behaviors on the ecological environment system and fundamentally reducing the pressure on the regional ecological environment to realize harmonious development of economy, society, and environment.