Axial flow fan mounting frame used for fresh air system and convenient to fix

The utility model discloses a convenient-to-fix axial flow fan mounting rack for a fresh air system. The convenient-to-fix axial flow fan mounting rack comprises a mounting seat and an axial flow fan body, the adjustable axial flow fan has the advantages that the lifting supporting legs are arranged, the installation height of the axial flow fan body can be adjusted according to actual installation requirements, the application range is wide, when the adjustable axial flow fan is used, the axial flow fan body with the installation blocks is placed on the installation base, the two installation blocks are located in the threaded sleeves on the two sides, then the handle is rotated, and the axial flow fan body is installed on the installation base. According to the axial flow fan, the threaded rod is driven to rotate through the rotating shaft, so that every two adjacent threaded sleeves get close to each other until the clamping blocks on the threaded sleeves are clamped in the limiting clamping grooves formed