The invention provides a method for processing a shell of an industrial plug socket, which aims to solve the following problems that: the shell is manufactured by a die-casting process, and the marketcannot supply special-model anti-explosion electric connectors which have few demands but are necessary; the die-casting process generates air bubbles and sand holes so that the strength and the toughness of the shell are greatly reduced; and the shell produced by the die-casting process contains impurities, the surface almost cannot be subjected to oxidation treatment, the shell is easy to be eroded, and the explosion-proof performance is reduced. The key point is that the method adopts a machining process to process aluminum alloy pipes into shells. The method has the following advantages:standard sectional materials are selected, the raw materials are easy to get, the price is low, and the die cost is saved; the market supply is satisfied; the shell has no air bubbles and sand holes,and the strength and the toughness are greatly higher than that of shells produced by the die-casting process; and the aluminum alloy pipe materials contain no impurities, the surface is easy to perform the oxidation treatment, and the corrosion resistance is improved remarkably.