Rotary sweeping type deep hole peening machine

The invention discloses a rotary sweeping type deep hole peening machine. The peening machine comprises a plurality of nozzles, each nozzle comprises at least three spraying holes, which are arranged at intervals; the plurality of nozzles are respectively arranged on corresponding nozzle extension pipes; and the nozzle extension pipes can be inserted into the deep holes to be swept in a rotation mode. The peening machine also comprises a nozzle rotating mechanism. The nozzle rotating mechanism comprises a plurality of rotation discs, which are linearly arranged, wherein the plurality of nozzle extension pipes are fixed on corresponding rotation discs; a connection rod, which comprises a plurality of hinge positions that are corresponding to the plurality of rotation discs, wherein the hinge positions are hinged to the corresponding radius positions of the plurality of rotation discs; a swing arm, wherein one end of the swing arm is connected to one end of the connection rod; and a crank, which is driven by a