The invention relates to a large-diameter inserting-rotating type water conveying one-way valve and belongs to the technical field of pipeline valves. The large-diameter inserting-rotating type water conveying one-way valve mainly solves the problems that a traditional one-way valve is heavy, large in size, long in dismounting time, large in labor intensity and the like. The large-diameter inserting-rotating type water conveying one-way valve is mainly characterized by comprising a valve body, a connecting body, a valve plate, an intermediate rotating shaft and a torsional spring; the two ends of the valve body are connected with the connecting body through connecting body inner side sealing rings; end face sealing rings are arranged at the outer end of the connecting body; the valve plate comprises two same half valve plates, the torsional spring is arranged on the intermediate rotating shaft in a sleeving manner, and the intermediate rotating shaft is connected with the two half valve plates of the valve plate through hinges; the two ends of the intermediate rotating haft are fixed to the valve body; and boss contact faces, corresponding to an inner cavity of the valve body, of the valve plate are provided with valve plate sealing rings. The large-diameter inserting-rotating type water conveying one-way valve has the beneficial effects of being simple in structure, small in weight, convenient and flexible to operate and safe and reliable in usage, is mainly used for preventing the impact of high-pressure water backflow on an impeller of a water pump on a movable remote water supply soft pipeline and can also be used for other pipelines needing to be rapidly connected.