Protective cover for paint spraying gun head

The invention discloses a protective cover for a paint spraying gun head. The protective cover comprises a fixing sleeve, a plastic support, an oil paper film and an internal threaded sleeve, wherein the inner ring of the fixing sleeve is connected with an internal plastic sleeve, the paint spraying gun head is inserted into the fixing sleeve, the end, located at a screw cap, of one of fastening screw rods is connected with the internal threaded sleeve in a threaded fit manner, the plastic support is arranged at the lower end of the fixing sleeve, the plastic support is formed by assembling an upper square frame, a lower square frame, a vertical plastic round rod and an inclined plastic round rod, and the oil paper film is applied to the outer side of the plastic support. The protective cover for the paint spraying gun head can be applied to paint spraying fields in various occasions, the air pollution during field paint spraying can be reduced, human errors in the paint spraying process can be reduced after