The invention provides a dynamic projection imaging device. The dynamic projection imaging device comprises a lighting module, an image sensor, and a processor, wherein the lighting module comprises alight source, a lens and a diffractive optical element, the light source emits a light beam, then the light beam is refracted by the lens and then is diffracted by the diffractive optical element soas to provide flood lighting or structured illumination for an illuminated space, the image sensor is used for collecting an image of an object when the object is illuminated by the lighting module, and the processor is used for controlling the lighting module so as to realize dynamic lighting. The processor controls one or more of the light source, the lens and the diffractive optical element inthe lighting module to change, so as to realize dynamic lighting, and high-quality and high-precision images can be generated through a fusion algorithm. The dynamic projection device has characteristics of small volume and low power consumption, thereby being likely to be integrated in an intelligent device.