Projection imaging device and projection lamp

The utility model relates to a projection imaging device and a projection lamp. The projection imaging device comprises a coherent light source used for generating incident point light; the first optical element is arranged on a light path of the incident point-shaped light, and the incident point-shaped light is converted into linear light after penetrating through the first optical element; the rotating optical module comprises a rotating piece and a second optical element connected with the rotating piece, the second optical element can be driven by the rotating piece to rotate around a preset rotating shaft to a light path of the linear light, and the linear light forms a linear light array after penetrating through the second optical element; when the second optical element rotates, the incident angle of the linear light on the second optical element changes. The incident point light generated by the coherent light source sequentially penetrates through the first optical element and the second optical el