Abstract: Stainless steel anchor channels (SSACs) have the advantages of good durability, high load-bearing capacity and easy fabrication & installation, which can effectively mitigate the drawbacks of carbon steel anchor channels that are prone to corrosion leading to large bearing capacity loss, and have a wide application in industrial buildings, subway and high-speed rail tunnels and utility tunnels. To study the mechanical behaviors of SSACs under combined tension and shear, finite element models were established by using ABAQUS. The rationality of the modeling approach was verified through a comparison with the tension and shear test results. In numerical simulation, the bearing capacity of SSACs under combined tension and shear was obtained by changing the shear force applied to the models to achieve different shear ratios. The influences of anchor channel type, load position, concrete strength grade, neighboring anchor distance and concrete edge distance on the mechanical performance and failure modes of SSACs under combined tension and shear were investigated. The results demonstrate that the serrated anchor channel exhibits a combined failure mode of channel lips failure and subsequent pull-out of channel bolt and bending of one side of the channel web, whereas the hook anchor channel exhibits flexural failure of the channel due to the tight connection of the channel bolt to the channel lips. The shear force has a significant effect on the load-bearing capacity of SSACs, and the larger the shear force ratio is, the smaller the bearing capacity is. The load-bearing capacity at a shear force ratio of 90% is only 24.83%-35.95% of that under tension. The neighboring anchor spacing and load position have an obvious effect on the load-bearing capacity of SSACs, whereas the concrete strength and concrete edge distance have limited influence on that. Finally, the strength formula of SSACs under combined tension and shear was proposed, and the rationality and applicability were verified through a comparison with the available test results of fastenings in existing literatures. The research outcomes will provide valuable reference for the formulation of specification of stainless steel anchor channel assemblies.