In this paper, for solving the adaptability and rock creep of foundation using in strongly weathered areas, the belled rock-anchor pile foundation is proposed and applied on the basis of the mechanical characteristics and loading test. The enlarged pile bottom and upper winding anchor technology are used for expanding the scope of application. In addition, the foundation can improve the bearing capacity, effectively slow the development of rock fractures and reduce the displacement of the rock anchor pile, providing references for similar projects.