The utility model discloses a draught fan with a triangular mechanism and a shock absorption function. Fan body, an air cap is arranged on the front surface of the right side of the fan body; whereinthe fan body is fixedly connected with the air cap, an air suction pipe is arranged on the front surface of the left side of the fan body, the fan body is fixedly connected with the air suction pipe,an impeller is arranged on the inner cavity wall of the air suction pipe, the air suction pipe is rotatably connected with the impeller, and a flow collector is arranged on the inner cavity wall of the air suction pipe and close to the left side of the impeller; a triangular connecting rod is arranged on an existing fan. the impeller and the motor can be fixed by utilizing the triangular connecting rod; the fan base is simple in structure and convenient to assemble, one-by-one mounting is not needed during assembling, mounting procedures are reduced, the reset spring is arranged on an existingfan base, damping can be achieved through the reset spring, a fastening bolt in the fan base is not prone to loosening or breaking, internal components of the fan base are protected, and the effectsof safety and convenience in use are achieved.