Mixed packed bed biological aerated filter sewage treatment device and treatment method

The invention discloses a mixed packed bed biological aerated filter sewage treatment device and a mixed packed bed biological aerated filter sewage treatment method, and relates to sewage treatment. The device is provided with a water inlet tank, a lifting pump, an air blower, a biological filter column and an aerator, wherein a water outlet of the water inlet tank is connected with an inlet of the lifting pump; the biological filter column is provided with a column body, a support plate, a water inlet and a water outlet; the outlet of the lifting pump is connected with the water inlet; the water inlet is formed in the bottom of the column body; the support plate is arranged above the water inlet; one ore more through holes for water distribution are formed in the support plate; a mixed filler is filled on the support plate in the column body; the water outlet is formed in the top of the column body; sampling ports are formed in the column body; an air outlet of the air blower is connected to the aerator at