Cementitious composite mats are a new type of building material that combines traditional cement and textile fiber technologies. They are mainly composed of special cement, three-dimensional fiber fabrics, and other additives. The three-dimensional fiber fabric serves as a framework, providing the basic shape and a certain degree of flexibility for the cementitious composite mat. The special cement is evenly distributed within the fiber fabric. Once in contact with water, the components in the cement will undergo a hydration reaction, gradually hardening the cementitious composite mat and forming a solid structure similar to concrete. Additives can be used to improve the performance of the cementitious composite mat, such as adjusting the setting time and enhancing waterproofing.