Abstract: At present, the simulation of the adhesive layer in the composite adhesive repair structure mostly adopts a two-dimentional planar element, which cannot effectively simulate the true stress state of the adhesive layer under the action of the external load. A three-dimensional finite element model is established for analyzing the three-dimensional stress state of adhesively bonded composite repair structures. The adhesive shear stress is calculated under uniaxial tensile loading condition, and compared with the Hart-Smith analytical solutions to validate the effectiveness of the present model. It is indicated that the finite element computation results correlate very well with those of the analytical solutions. The distributions of the adhesive shear stress and the peel stress, as well as the mechanism of the failure mode of the adhesive, are analyzed based on the finite element model. The present model and the analytical approaches may help the investigation of the load-bearing capacity of the patched structure and improve the design accordingly.