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The body wall structure of Clanis bilineata larva exhibits a strong stability under bending load. This characteristic prompted the development of a new inflatable tube to improve the stability under bending load. The Clanis bilineata larva was chosen to observe the connection between its body wall and nearby muscle tissues, as well as the distribution of these tissues, by using the tissue section technique. The Clanis bilineata larva can be simplified as a telescopic cylinder with folds and depressions. A large number of axial muscle tissues were found on the inner cylinder, which were uniformly distributed near the cylinder and divided into several sections in the axial direction. Between adjacent sections, a close connection to the body wall was formed. The distribution of the circular muscle tissues was relatively dense, and the distribution in the reticular structure enhanced the mechanical strength of the whole insect body and improved the stability of the structure. This structure simultaneously became a barrier to reduce impact from the outside world on the internal organs and ensured the normal physiological activities of the Clanis bilineata larva. Inspired by this, an inflatable tube with reinforcing ribs was designed. Simulation using the finite element method and experimentation were employed to analyze the bending characteristics of the inflatable tube with and without reinforcing ribs under different pressures. Results indicated that the ultimate load of both inflatable tubes was increased linearly with the increase of pressure;the existence of reinforcing ribs can improve the bending characteristics of the tube, at the same time, the simulation results showed that the bending capacity of inflatable tube with reinforcing ribs was stronger when loading at 45° angle than that at 0° angle, both of which were higher than that without reinforcing ribs.