The invention discloses a novel inner tube assembly. The novel inner tube assembly comprises an inner tube main body and a sealing section. One side of the inner tube main body is provided with a wind nozzle. A concave hole corresponding to the wind nozzle is correspondingly formed in the other side of the inner tube main body. The left side and the right side of the inner tube main body are symmetrically provided with opening parts. One side of the sealing section is provided with corresponding openings corresponding to the opening parts. The other side of the sealing section is provided with a sealing edge. By means of the novel inner tube assembly, a car inner tube can be fast replaced, the problem that replacing of the inner tube in a traditional mode is not convenient is solved, an expanding fracturing phenomenon caused by pressure generated from the replaced inner tube can not completely appear, the whole damage rate is low, the quality is good, and the high promoting valve is achieved.