The utility model discloses a compressor outlet duct structure, including crooked tubular construction, the both ends of tubular construction are fixed with the flange, evenly set up the bolt hole on the flange of one end, the bolt hole sets up at the edge of flange, and the bolt hole is semi -circular, the flange of the other one end of tubular construction still sets up the bellows. The utility model has the advantages that: owing to adopted the edge of bolt hole setting at the flange, and the bolt hole be the semicircular structure, can conveniently adjust with the concentricity of outlet duct complex part, in addition, the setting of bellows is not only sealed effectually, is favorable to the adjusting matching clearance moreover.