According to an embodiment of the present invention, disclosed is a device for machining a grinding plate comprising: a rotating table (50) which supports and rotates a grinding plate; a drive unit (90) which supplies rotation power to the rotating table; an edge machining unit (10) which machines the edge of the grinding plate placed on the rotating table; and an inner machining unit (30) which machines the inner area of the grinding plate placed on the rotating table. [Reference numerals] (10) Edge processing unit;(200) Controller;(30) Inside processing unit;(50) Rotating table;(90) Driving unit
