Edge-coupling standing wave accelerating tube

The invention provides an edge-coupling standing wave accelerating tube. The accelerating tube comprises a main cavity chain, coupling cavities and cooling tubes, wherein a plurality of holding grooves are formed in the outer surface of the main cavity chain, the holding grooves are distributed around the main cavity chain and respectively extend in the axis direction of the main cavity chain, and the cooling tubes are embedded in the holding grooves. Through the use of the edge-coupling standing wave accelerating tube disclosed by the invention, the cooling efficiency is effectively improved, the energy consumption of a cooler unit is reduced, besides the integral structure of the accelerating tube is compact, the accelerating tube is particularly used for a small-scale edge-coupling standing wave accelerating tube with a smaller outer diameter, a water tube with a smaller tube diameter can be adopted, and the accelerating tube is convenient to design and arrange. Compared with an inner-cooling structure, and under the premise that the cooling effect is not lost too much, the risk of leakage in the body of the accelerating tube can be effectively avoided.