The invention discloses a grate type transition cooling device. The grate type transition cooling device comprises a kiln head cover, a transition cooling device and a single-cylinder cooler. The transition cooling device comprises a shell, a grate cooling module and an air inlet tank, wherein the shell is internally provided with a vertical channel. The grate cooling module is internally providedwith grate gaps. The upper portion of the vertical channel communicates with the kiln head cover, and the side face of the vertical channel is provided with a material outlet communicating with the single-cylinder cooler. The grate type transition cooling device has the beneficial effects that the grate type transition cooling device is arranged between a rotary kiln and the single-cylinder cooler to transport materials and carry out real-time cooling through cold air, the temperature of the materials when the materials enter the single-cylinder cooler is reduced, the length of the followingsingle-cylinder cooler can be reduced, the floor space is reduced, the problems that the heat dissipation loss of the single-cylinder cooler is large, the discharging temperature is high, the heat recovery efficiency is low, and the water supply volume is large are solved, after the temperature of the cold air carrying out heat exchanging on the materials is raised, the air can be used for heatingthe materials in the rotary kiln, and the recovering of the heat energy is achieved.