Grate cooler device capable of preventing air leakage and material leakage

The utility model provides a grate cooler device capable of preventing air leakage and material leakage, and relates to the technical field of grate coolers, the grate cooler device comprises a box body, a chain conveyor, a waste heat recovery port and a cooling mechanism, the cooling mechanism comprises an air cooler, a cold air pipe, a first air box and two second air boxes, and the second air boxes are symmetrically and fixedly connected to the two sides of the top of the chain conveyor; the two sides of the chain conveyor are provided with the second air bellows, the second air bellows are provided with the second air jet holes, the first air bellows is arranged above the discharging end of the chain conveyor, and the end, close to the chain conveyor, of the first air bellows is provided with the first air jet holes, and the second air bellows are arranged on the two sides of the chain conveyor, so that clinker leakage and waste are prevented; cold air jetted from the second air jet hole forms hot air aft