The invention relates to a holographic projection device convenient for ventilation and heat dissipation for virtual reality. The device comprises a main body, an air inlet mechanism, an air distribution mechanism, an exhaust mechanism and a plurality of support legs, wherein the air inlet mechanism comprises an air inlet pipe, an air exchange chamber, an ash discharge pipe and a switching assembly, openings are formed in the two sides of the bottom end of the air inlet pipe, a filter screen is arranged in the opening, a fan and a vertical rod are arranged in the air inlet pipe, the air distribution mechanism comprises an air distribution chamber, a vertical pipe, a transverse pipe, a rotating assembly and a plurality of spray nozzles, and the rotating assembly comprises a rotating shaft and a plurality of rotors. According to the holographic projection device convenient for ventilation and heat dissipation for virtual reality, external air is conveniently introduced into the air distribution mechanism through the air inlet mechanism, and the filter screens are dredged in time to prevent blockage. In addition, the cold air can be uniformly distributed in the main body through the air distribution mechanism, so that the cooling and heat dissipation effects are improved, the temperature in the main body is reduced, the service life of the equipment is prolonged, and the practicability of the equipment is improved.