Abstract: This article, based on a specific project, delves into renovation methods for existing coal mill foundations.Currently, in the renovation of domestic coal mill foundations, the traditional approach of completely demolishing and reconstructing the equipment and the foundation as a whole is often adopted.However, this method is very difficult to remove.It not only requires considering a series of complex measures, such as deep foundation pit support, dewatering and drainage, but also has significant drawbacks, such as a long construction period and a huge amount of work.To effectively address the above-mentioned issues, this article innovatively proposes two targeted renovation methods: the anchor boltdrilling method and the local concrete replacement method.Both methods aim to maximize the utilization of the original equipment foundation, focusing on local renovation and reinforcement.Through an in-depth comparative analysis of these two new methods, their applicable scenarios and technical advantages are clarified.The research results of this paper have important guiding significance and reference value for similar engineering renovation projects, contributing to promoting the development of engineering practices in this field towards a direction of high efficiency, economy, and environmental friendliness.