The invention discloses a taking and draining device of a glass polishing machine. The taking and draining device comprises a supporting frame and an arc-shaped U-shaped groove body; the supporting frame is used for fixing the U-shaped groove body to an upper fixed disc base of the glass polishing machine; an arc-shaped groove of the U-shaped groove body faces an upper fixed disc of the glass polishing machine and is correspondingly matched with the outer edge of the upper fixed disc of the glass polishing machine; when the upper fixed disc of the glass polishing machine is overturned to be in a vertical state, the U-shaped groove body is overturned to be right below the upper fixed disc of the glass polishing machine along with the upper fixed disc base; the sealing surface of the U-shaped groove body is further connected with a drainage pipe; when a glass substrate is taken off, wash water can flow into the arc-shaped groove of the U-shaped groove body, passes through the drainage pipe and then is drained in time, the wash water does not enter a polishing solution, the concentration of the polishing solution can be maintained, polishing powder does not need to be added, and waste can be avoided.