The utility model discloses a dual-purpose rotating spray gun for dust removal and cleaning, comprising a gun body (1), a trigger switch (2), a pot body assembly and a rotating spray apparatus, wherein the rotating spray apparatus comprises a bidirectional connector (3), a spray nozzle (4), a connecting sheath (7), a hollow rotating shaft (5), a rotating spray head (10), a spray pipe (9) and a cleaning solution suction pipe (13); one end of the bidirectional connector (3) is fixed to an air passage outlet of the gun body (1); the other end is fixed to the connecting sheath (7); the hollow rotating shaft (5) is arranged in the connecting sheath (7); the spray nozzle (4) is fixed to an outlet of the bidirectional connector (3); the spray head of the spray nozzle (4) is matched with the hollow rotating shaft (5); the rotating spray head (10) is fixed to the hollow rotating shaft (5) and is provided with a rotating spray track (18); the spray pipe (9) is fixed to the rotating spray track (18); an inlet of the spray pipe (9) is communicated with the hollow rotating shaft (5); and an outlet of the spray pipe (5) is positioned on an outer end surface of the rotating spray head (10). After the structure is adopted, the utility model has the characteristics of simple structure, convenient production and processing, stable quality, low operating conditions, good dust removal and cleaning effects, long life and the like.