The honeycomb sandwich is widely used in the aircraft structure, especially in helicopter structure. The edge closure is a specific problem for this structure. The ramp areas of the sandwich edge is a typical form to transition and link with other structure. The sandwich ramps area usually used the intumescent adhesive bonding the honeycomb due to the curing pressure was no uniform during the molding process, and its mechanical properties was decreased gradually with the rise of temperature. As a result, the bonding strength at the ramp area of honeycomb sandwich was affected, which affected the force transmission at the edge of the entire honeycomb sandwich structure. The stress distribution at the edge of honeycomb sandwich under the full action of the intumescent adhesive in the ramp area at normal temperature was analyzed by the static strength. Considering that the intumescent adhesive tube shear performance was reduced at 120 ℃, the stress at the edge of honeycomb sandwich under 120 ℃ environment was analyzed by using thermo-mechanical coupling method. The calculation results show that the ramp area of honeycomb sandwich structure still meets the strength requirement under the condition of high temperature without the effect of intumescent adhesive.