Abstract: The present disclosure discloses a rotary type star projection lamp with an audio playing and atmosphere set-off functions, and belongs to the technical field of star projection lamps. The rotary type star projection lamp includes a lamp house and a base, wherein a top end of the lamp house is connected with a cover plate; the cover plate is provided with a star lampshade and two cloud lampshades; a side wall of an inner bottom of the lamp house is connected with a drive motor; an output end of the drive motor is connected with a chain wheel assembly through a drive shaft; and a star light scattering sheet and two cloud light scattering sheets are respectively arranged above the chain wheel assembly.