The invention discloses a high-speed carving machine for plane glass. The high-speed carving machine comprises a carving table, a fixing base and a carving mechanism. The fixing base is provided with buffering cushions, and a glass positioning groove is formed in the carving table. A glass supporting frame and synchronous driving devices are arranged in the glass positioning groove. The synchronous driving devices are connected with the glass supporting frame through main telescopic rods. Cantilevers are symmetrically arranged on the two sides of the main telescopic rods. The ends of the cantilevers and the ends of the main telescopic rods abut against the bottom face of the glass supporting frame through trays. Horizontal sliding rails which are parallel are arranged on the two sides of the carving table. The carving mechanism is movably connected to a cross beam, and glass conveying guide grooves are formed in the inner side faces of the horizontal sliding rails. Bracket mechanisms are arranged in the glass conveying guide grooves. The high-speed carving machine is simple in structure and high in practicability, glass workpieces can be positioned and prevented from moving during carving, the glass workpieces can be automatically taken and placed, machining precision is improved, carving time is shortened, meanwhile, the glass workpieces are effectively protected, and abrasion is reduced.