Rotation driving device for rotating pipe weapon

The invention discloses a rotary driving device for a rotating pipe weapon. The rotary driving device comprises a gun barrel group consisting of a plurality of gun barrels, wherein the gun barrel group sequentially passes through an outer tube and a gas enclosing device; a rotator is arranged in the outer tube; the gas enclosing device comprises a gas guiding tube; the gas guiding tube is fixedly connected with the rotator; a plurality of hole channels are arranged in the rotator; the rotator comprises a central hole channel and branch hole channels; the central hole channel communicates with the gas guiding tube; the branch hole channels are separately positioned between the adjacent gun barrels; moving blocks are arranged in the branch hole channels; a gas inlet is formed between the corresponding moving block and the central hole channel; a gas outlet is formed in one side of the corresponding moving block; a hollow cavity is formed in the gas guiding tube; a gas inlet hole is formed between the hollow cav