The invention discloses an edging device for a table tennis ball. The device comprises a rack, a lower clamping part which is vertically rotatably arranged on the rack, an upper clamping part which is vertically rotatably arranged on the rack and can move up and down, and a scrapping knife which is arranged on the rack and can horizontally move, wherein the lower clamping part and the upper clamping part are arranged on the same axis line, and a clamping space is formed between the upper clamping part and the lower clamping part; an edge of the scrapping knife is as high as the middle part of the clamping space. According to the edging device for the table tennis ball, the table tennis ball is rotated after being clamped through the lower clamping part and the upper clamping part, and the scrapping knife can translate toward the table tennis ball so as to grind and remove redundant edges of the table tennis ball.