The invention provides a recovering device for powder of a glass edge grinding machine. The device comprises a driving device (1), an extruding screw (2), a housing (3), a discharging opening (4) and a feeding opening (5), wherein the driving device (1) is fixedly mounted at the bottom part of the frame; the housing (3) is fixedly mounted at the upper part of the frame; the discharging opening (4) sleeves one end of the extruding screw (2) by connecting through a key, and the discharging opening (4) and the extruding screw (2) are mounted in the housing (3) together; the extruding screw (2) and the housing (3) are connected through a deep groove ball bearing and a thrust bearing; a belt pulley is mounted at the other end of the extruding screw (2) by connecting through the key, wherein the belt pulley is mounted on an output shaft of the driving device (1) by connecting through the key; one end of the discharging opening (4) is closed, and while the other end of the discharging opening (4) is opened according to the structure. The device has the advantages of being simple in structure, convenient to recover powder, small in power, and high in efficiency.