In order to analyze the stress and strain state of the arch consolidated complex joint of the long-span beam arch combined bridge, the spatial stress distribution of the arch beam joint of Yuehu super Bridge is studied. Through the three-dimensional finite element model and the scaled solid model, the stress behavior of the joint part of the arch foot is analyzed. The results show that the maximum edge stress of the main beam is 249.5MPa, and the stress at the root of the arch rib is diffused. The overall deformation gradually increases towards the root of the arch rib. The maximum deformation is 3.6cm at the root of the arch rib, and the overall deformation gradually increases from the junction to the root of the arch rib. The load test is in good agreement with the finite element results. The cast-in bridge panel has no obvious buckling and cracks, and the structural force is reasonable, meeting the requirements of the code. It has important theoretical and practical significance to provide reference for similar projects.