Inflating safety life-buoy with outer hood

A pneumo type safe swim ring with outer cover belongs to the body-building instrument for recreation and entertainment in water, which comprises a front polygon and a back polygon, an gasbag with multi gasbag and a gasbag outer cover, movable connecting strips capable of adjusting the length on the outer cover form the gas ring for people's use. Based on the multi gasbag, frowst, flat shape, the utility model achieves big safety coefficient and small resistance in the water. The outer cover can separate the human body and the gasbag, thereby preventing the harmful matter from stimulating the human body and benefiting the human health. Besides, the utility model can be flexibly adjusted for use according to the different swimming levels. If the swimmer can not swim at not, the front piece and the back piece of the utility model can be used simultaneously. If the swimmer knows to swim a little, only the front piece or the back piece is required to provide the swimmer with safety, convenience and reliability.