Inflatable structure is a special form of membrane structure, which uses the difference between internal and external pressure to tense the membrane surface to resist external loads. The inflatable membrane structure can be divided into three types according to its shape: single-layer inflatable membrane structure, double-layer inflatable membrane structure and tubular inflatable membrane structure. Inflatable structure is a special form of membrane structure, which uses the difference between internal and external pressure to tense the membrane surface to resist external loads. The inflatable membrane structure can be divided into three types according to its shape: single-layer inflatable membrane structure, double-layer inflatable membrane structure and tubular inflatable membrane structure.