The invention relates to a dry discharge technology of tailings, belonging to the technical field of tailing disposal. The dry discharge technology of the tailings has the technical scheme that a cyclone and a dewatering screen are used for discharging the coarse particles of the tailings with the particle sizes of more than 0.074mm in a dried way, a thickener is used for concentrating the fine particles with the particle sizes of less than 0.074mm, and the separated coarse particles and fine particles are mixed again by a mixer, so that the tailings with uniform particle size can be discharged. The dry discharge technology of the tailings has the beneficial effects that the influence of pollution such as blowing sand and dust to the environment caused by separately stacking the fine particles in the traditional dry discharge technology can be effectively improved, the flow process equipment can be effectively simplified, the running cost is lowered, the flow process data is flexible to adjust, and the comprehensive utilization efficiency of the tailings can be improved.