Supporting frame

The utility model discloses a supporting frame, and particularly relates to the technical field of supporting frames, the supporting frame comprises a base, a plurality of hydraulic telescopic rods are fixedly installed at the upper end of the base, a fixing box is fixedly installed at the upper ends of the hydraulic telescopic rods together, and a pedal is fixedly installed at the upper end of the fixing box; and a plurality of front-back through ventilation pipelines are formed in the fixed box, filter screens are fixedly installed at the front ends of the ventilation pipelines, and filter screen cylinders are fixedly connected to the rear ends of the ventilation pipelines. According to the supporting frame, the height of the pedal is adjusted through the arranged hydraulic telescopic rod, the trouble that a worker needs to bend back and forth to work in the middle of a wall when working at the fixed height is avoided, and the labor intensity of the worker is greatly reduced; and meanwhile, a ventilating pi