Abstract: With the acceleration of urbanization development，more and more deep excavation appear in urban construction. The deep excavations have developed towards greater and deeper direction, and large number of projects are located in the urban area. So, the problems caused by the excavation of foundation pits have become more prominent. As a complex excavation support form, the new combined supporting structure of pile-strut bracing-anchor has many influencing factors and its design theory is immature. Combined with the practical work, the laws of force and deformation of the combined supporting structure of pile-strut bracing-anchor are analyzed by means of theoretical analysis and field monitoring. According to the numerical results and track construction, some suggestions are given for its design and monitoring.