The slope stability of a project section of the ancient city of Jiaohe reinforced by wood anchors was investigated using the strength reduction finite element method. The safety factor of stability of the reinforced slope was given under a static load and under earthquake forces. The influences of the wooden bolt length, anchorage angle, and other factors on the safety coefficient were also analyzed. Finally, the wood anchor reinforcement mechanism of the slope was analyzed, which determined the existence of several problems that should be resolved in the future design of reinforced wood anchor slopes. The research results may provide a reference for other soil slope projects reinforced by wood anchors.