Microwave drying and expanding equipment

The invention discloses microwave drying and expanding equipment. The microwave drying and expanding equipment comprises a feeding cabin, a first preheating system, a microwave heating system, a discharging cabin and a material channel, wherein the feeding cabin, the first preheating system, the microwave heating system and the discharging cabin are arranged sequentially; the material channel penetrates through the first preheating system and the second preheating system and is connected with the feeding cabin and the discharging cabin; a flow control device is arranged in the material channelbetween the microwave heating system and the discharging cabin; the microwave drying and expanding equipment further comprises an automatic control system; the automatic control system is used for controlling the first preheating system to preheat the materials after the materials enters the material channel from the feeding cabin, controlling the microwave heating system to dry and expand the preheated materials, contro