Cracks are a common phenomenon in large-volume concrete and are an important issue of concern in the engineering field. To address the so-called problem of “no dam without cracks,” engineering technicians have adopted a series of technical measures, such as mix proportion optimization, high fly ash content, and expansive agents, which have played a certain role in controlling the generation and propagation of cracks. This paper introduces the proposed layered water-locking technology and a new type of excellent anti-cracking material developed using this technology, which maximizes the reduction or even prevention of cracks in large-volume concrete, enhancing the concrete’s own crack resistance.