Tunnel kiln type garbage biological drying system and method

The invention relates to the technical field of garbage drying treatment, and discloses a tunnel kiln type garbage biological drying system and method.The tunnel kiln type garbage biological drying system comprises a tunnel kiln type drying bin, and a feeding and discharging port and a bin door used for sealing the feeding and discharging port are formed in one side of the tunnel kiln type drying bin; a blast aeration device is laid at the bottom of the tunnel kiln type drying bin; the blast aeration device comprises a ventilation pipeline and a plurality of aeration nozzles arranged on the ventilation pipeline; the tunnel kiln type drying bin is connected with an odor collecting and treating device through an odor collecting pipeline; the odor collecting and treating device comprises a heat exchanger, a chemical washing tower and a cooling tower; the heat exchanger is connected with the sewage collecting device through a condensate collecting pipeline; and the sewage collecting device is arranged outside the