The invention discloses a rear projection type projecting and teaching integrated device and mainly relates to the field of audio-visual educational equipment. The integrated device comprises a rack, a projector and a teaching board, wherein a camera slot is formed in the lower part of the rack; the projector is arranged in the camera slot and performs projection towards the upper backward direction; a reflector capable of being folded is arranged on the back side of the rack; the teaching board is arranged on the middle upper part of the rack; a transparent acrylic writing board is arranged in front of the teaching board; rear projection cloth is arranged on the inner side of the writing board; optical fibers capable of lifting are arranged on the writing board; light sources capable of enabling the optical fibers to light are arranged at the two ends of the optical fibers; and an automatic cleaning device in horizontal sliding connection with the teaching board is arranged on the front side of the teaching board. The rear projection type projecting and teaching integrated device disclosed by the invention has the beneficial effects that the device has the functions of blackboard-writing, cue mark and the like, can meet the narrow-range high-level teaching requirements and has the advantages of being capable of folding and containing, easy to clean and long in service life, the maintenance cost is reduced, and general popularization is facilitated.