The utility model provides a tunnel I-shaped steel machining and conveying device. The tunnel I-shaped steel machining and conveying device comprises a rack, two fixing pieces and a plurality of transmission pieces. Two sets of first grooves are correspondingly formed in the top face of the rack, and the multiple first grooves in each set are distributed in the conveying direction of the I-shapedsteel at intervals. The two fixing pieces are arranged in parallel, a plurality of second grooves are formed in the positions, corresponding to the two sets of first grooves, of the two fixing piecesrespectively, the two fixing pieces are detachably installed on the rack through locking bolts, and an installation space is defined by each second groove and the corresponding first groove jointly; the transmission parts are distributed at intervals in the conveying direction of the I-shaped steel, each transmission part comprises a transmission shaft, a transmission steel pipe and two bearings,the axial direction of the transmission shaft is perpendicular to the conveying direction of the I-shaped steel, the transmission steel pipes are arranged on the transmission shaft in a sleeving mode,and the two bearings are arranged at the two opposite ends of the transmission shaft respectively and clamped and fixed in the corresponding installation spaces respectively. The tunnel I-shaped steel machining conveying device can reduce the labor intensity of tunnel I-shaped steel machining.