Disclosed is a projection type vein indicating instrument. The projection type vein indicating instrument comprises a light equalization slice, an infrared light emitting diode group, a hot mirror made of optical glass material, an infrared filter, an infrared CCD (charge coupled device), a micro projector and a single chip computer system, wherein the light equalization slice is located at the bottom, the infrared light emitting diode group composed of infrared light emitting diodes circularly arranged is arranged above the light equalization slice, the hot mirror made of the optical glass material is arranged on the upper portion of the infrared light emitting diode group, the infrared filter is arranged on the hot mirror, the infrared filter is connected with the single chip computer system through the infrared CCD, the infrared light emitting diode group emits infrared light 760-940nm in wavelength, the single chip computer system processes an obtained original image so as to convert the original image into a clear vein image, and the single chip computer system transmits the obtained clear vein image to the micro projector. The projection type vein indicating instrument is simple in structure design, high in detection speed, high in detection accuracy, and high in reliability.