The invention provides a dust removing nozzle of a converter valve. The dust removing nozzle comprises a spraying gun and an air pipe; a discharge needle is arranged in a nozzle of the spraying gun, and is connected with a high-voltage generator; a handle is arranged on the spraying gun; an annular pipe is mounted on the handle, and is positioned at the side part of the nozzle of the spraying gun; a dust sucking port is formed in the annular pipe, and has the same direction with the nozzle of the spraying gun; the two ends of the air pipe are respectively an air inlet and an air outlet; the air inlet of the air pipe and the annular pipe are connected through an intake pipe; the air outlet of the air pipe and the spraying gun are connected through an exhaust pipe; and a fan and a dust removing filter are arranged in the air inlet of the air pipe. The high-voltage generator generates 4 kV high voltage to apply to the discharge needle so as to ionize out positive and negative ions from gas; and meanwhile, high-voltage gas generated by the air pipe is used for blowing the generated positive and negative ions to the surface of a device to eliminate static electricity on the surface of the device below 50 V so as to accord with the specification of eliminating the static electricity on an object. Dust is sucked away through the annular pipe, and is filtered by the dust removing filter.