Capsule type self-gas-production stomach volume-reduction and weight-reduction airbag

The invention belongs to the technical field of medical apparatus and instruments, and discloses a capsule type self-gas-production stomach volume-reduction weight-reduction air bag which sequentially comprises a gastric-soluble capsule layer, an air bag layer and a gas production agent in the air bag from outside to inside. The composition for inducing aerogenesis by using the intragastric temperature gradient is used as an aerogenesis agent and is prepared from the following components in percentage by mass: 1 to 20 percent of component A, 5 to 30 percent of component B, 55 to 95 percent of component C, 0.05 to 0.5 percent of component D and 0.05 to 0.5 percent of component E. The component A is selected from any one or two of 1, 1, 1, 3, 3-pentafluoropropane-ethanol azeotrope and trans-1-chloro-3, 3, 3-trifluoropropene, and the component B is selected from any one or two of 1, 1, 1, 3, 3-pentafluoropropane-ethanol azeotrope and trans-1-chloro-3, 3, 3-trifluoropropene. And the component B is selected from a