The invention belongs to the technical field of material transfer equipment, and particularly discloses a hydraulic device. The hydraulic device comprises a machine frame, a pushing mechanism and a material transferring mechanism, wherein the pushing mechanism and the material transferring mechanism are arranged on the machine frame; a material table is arranged on the machine frame, and a discharging pipe is arranged above the material table; the pushing mechanism comprises a hydraulic cylinder used for pushing materials; the material transferring mechanism comprises a hydraulic motor drivenby a hydraulic pump, a crank is arranged on an output shaft of the hydraulic motor, a connecting rod is hinged to the end of the crank, a sector gear is hinged to the machine frame, the connecting rodis hinged to the lower end of the sector gear, and a gear meshed with the sector gear is arranged on the machine frame; a first swing rod and a second rotary shaft are hinged to the machine frame from bottom to top, a transfer table is arranged below the first swing rod, a material taking rod is arranged between the first swing rod and the second swing rod, and the lower end of the material taking rod can extend to the transfer table; and a movable rod is hinged to the eccentric position of the side face of the gear, the end, away from the gear, of the movable rod is provided with a materialtransferring block in a hinged mode, and the material transferring block is connected to the transfer table in a sliding mode. According to the scheme, the transfer of workpieces in the vertical direction is realized, and the continuity of a production line is ensured.