The invention provides a full-automatic blade double-side grinding device. The full-automatic blade double-side grinding device comprises a first workbench and a second workbench. The bottom of the first workbench is fixedly provided with a support frame. A mounting plate is welded to the support frame. A charging hydraulic rod is mounted on the mounting plate through a bolt. The top of one side of the first workbench is provided with a charging lifting platform. The charging lifting platform is fixedly connected with a piston rod of the charging hydraulic rod. A first supporting plate and a second supporting plate are mounted at the tops of the two sides of the first workbench through bolts correspondingly. The two ends of two sliding rods are mounted on one side of the first supporting plate and one side of the second supporting plate through bolts correspondingly. A first manipulator, a second manipulator and a third manipulator are each provided with two through holes. The first manipulator, the second manipulator and the third manipulator are arranged on the sliding rods through the through holes in a sleeving mode. The full-automatic blade double-side grinding device is reasonable in design and can grind two sides of blades in a full-automatic mode, and the machining efficiency is high.