The invention discloses a grinding head feeding mechanism of a glass edge grinding machine. The grinding head feeding mechanism comprises a plurality of grinding heads, a grinding head sliding plate, grinding head feeding screws and positioning baffles; the grinding heads are fixed to the grinding head sliding plate, and the grinding head sliding plate is in screw joint with the grinding head feeding screw; each positioning baffle is arranged on one side of the corresponding grinding head; and the mechanism further comprises a servo motor; a plurality of speed reducers are in series connection to a rotating shaft of the servo motor through a coupler, and clutches are connected to the speed reducers; the clutches are connected with the grinding head feeding screws; a hand wheel assembly is arranged on the coupler and enables the coupler to rotate through manual operation; and the thickness of the positioning baffles is matched with the feeding needs of the corresponding grinding heads. The grinding head feeding mechanism is low in investment cost, and precise in grinding head feeding, meanwhile, the manual adjusting function is achieved, and the production efficiency is improved.