A steam soot blowing device is provided, including: a steam sootblower, a first pipe communicating with the steam sootblower; and nozzle assemblies communicating with the first pipe, including a first nozzle assembly and a second nozzle assembly, wherein the first nozzle assembly includes a throttle pipe with one end communicating with the first pipe, and a sprayer communicating with the other end of the throttle pipe, and diameter of an inlet of the sprayer is smaller than diameter of an outlet thereof; the second nozzle assembly includes a distribution pipe communicating with the first pipe and at least one nozzle communicating with the distribution pipe, wherein steam jet velocity at the outlet of the sprayer is greatly smaller than steam jet velocity at an outlet of the nozzle.