Chain grate machine capable of increasing heat

The utility model discloses a chain grate capable of increasing heat, which comprises a preheating assembly, and the preheating assembly comprises a main air inlet main pipe, a chain grate, a first drying section, a second drying section, a first preheating section, a second preheating section, a rotary kiln, a heat compensation burner, a branch air inlet pipeline, a main air inlet pipeline and an air inlet fan. Pellets in the first drying section are subjected to primary drying treatment by recycling heat of the second drying section and the middle section of the air cooler, and the pellets entering the second drying section are further dried through heat released by the heat supplementing burner, so that drying treatment of the pellets is completed. Pellets in the first preheating section are preliminarily preheated by recycling heat at the tail of the rotary kiln, and the pellets entering the second preheating section are further preheated by heat released by the heat supplementing burner, so that the dryi