The present invention discloses a high-strength air-intensive-type closed bus-bar groove, pertaining to the technical field of power equipment. The bus-bar groove comprises a shell body. The shell body consists of closed side plates on the left side and the right side, a cover plate and a closed base plate. The outer surfaces of the closed side plates on the left side and the right side, the coverplate and the closed base plate are all corrugated-type ripple groove structure. The closed side plates on the left side and the right side, the cover plate and the closed base plate form a bus-bar groove closed space. The closed side plates on the left side and the right side, the cover plate and the closed base plate are fastened by adopting locking bolts. Conducting bus-bars are vertically arranged in the bus-bar groove closed space. The conducting bus-bars are arranged in the bus-bar groove closed space after the conducting bus-bars are wrapped with insulating dielectrics. U-shaped rubbercushions are arranged between the contact surfaces of the conducting bus-bars wrapped with the insulating dielectrics and the closed base plate and the cover plate as buffer protection layers. The bus-bar groove has the advantages of improved durability of products, reduced scrap rate, saving of production cost, simple procedure and convenient operation.