Adhesive structure is widely used in optical instruments because of its simplicity, uniform stress distribution and good temperature adaptability. The back embedded adhesive structure for mirror support is analyzed theoretically. The principle for choosing adhesive is determined as choosing adhesive with low elastic modulus. The adhesive structure parameters including adhesive thickness and adhesive area are analyzed from mechanical and thermal properties. The adhesive structure′s effect on mirror position accuracy is analyzed, which includes mirror decenter and movement along optical axis.