Bottom lifting type aeration device of biological filter

The utility model relates to the technical field of environmental protection and sewage treatment, and discloses a biological filter bottom lifting type aeration device which comprises a main body mechanism, a lifting mechanism and a fixing mechanism, the lifting mechanism is located at the upper end of the main body mechanism, and the fixing mechanism is located at the upper end of the main body mechanism. The main body mechanism comprises a reaction tank, a gas inlet pipe, a gas conveying hose, an aeration pipe, a fixing ring and a fixing rope, the gas inlet pipe is fixedly connected to the upper end of the interior of the reaction tank, the upper end of the gas conveying hose is fixedly connected to the lower end of the gas inlet pipe, and the middle of the upper end of the aeration pipe is fixedly connected to the lower end of the gas conveying hose; the fixing rings are fixedly connected to the two sides of the aeration pipe, the two ends of the fixing rope are fixedly connected to the fixing rings on th