The invention discloses a rotary-liquid atomizing spray nozzle for high-temperature high-pressure environment. The rotary-liquid atomizing spray nozzle comprises a spray head base, a spray head, a rotary-liquid device and a distribution ring, wherein the spray head base is provided with a cavity which penetrates back and forth, the cavity comprises a spray head mounting hole located at the front end of the cavity and a distribution ring mounting hole positioned in the rear side of the spray head mounting hole, the distribution ring is arranged in the distribution ring mounting hole, the distribution ring is provided with at least two flow division holes, the spray heads are arranged in the spray head mounting holes, the spray head is provided with a through-flow hole and a spray nozzle, the through-flow hole penetrates through the spray head backwards, the rear end of the nozzle communicates with the front end of the through hole, the front end of the nozzle extends forwards to penetrate through the nozzle, the rotary-liquid device is arranged in the through-flow hole, a spiral groove is formed in the outer part of the rotary-liquid device, and the front end of the spiral groove communicates with the nozzle. According to the rotary-liquid atomizing spray nozzle, the distribution ring is used for dividing fluid into multiple strands, so that the fluid can be rapidly and uniformly distributed to the circumferential region of the rotary-liquid device, the flow resistance of the fluid is reduced, and meanwhile the flow rate of the fluid is increased; and the fluid is accelerated again when passing through the spiral groove, and the uniformity of the atomized liquid drops is improved.