The invention provides a plane stone grinding and polishing integrated device. The plane stone grinding and polishing integrated device comprises guide rails and a sliding frame. The two guide rails are arranged and fixed in parallel. The front view section of the sliding frame is in a U shape, the two sides of the top end of the sliding frame are downwards bent, and sliding wheels are arranged inthe bent parts. The middle bottom of the sliding frame is a plane. A plurality of grinding motors are fixed to the plane. Power output shafts of the grinding motors are arranged downwards. Grinding blocks are fixed to the parts, at the lower ends of the grinding motors, of the power output shafts, the multiple grinding motors are distributed in an even number line matrix manner, the first line isthe front end, and from the first line, the grinding blocks fixed to the lower ends of every two lines of grinding motors are the same in specification; and from the first line, the surface granularity of the grinding blocks fixed to the lower ends of the grinding motors on any rear lines is not rougher than the grinding blocks fixed to the lower ends of the grinding motors on any front lines. According to the plane stone grinding and polishing integrated device, the grinding motors are fixed in an even number line matrix distribution manner so that grinding stone can be distributed in an even number line matrix manner, and accordingly the process of grinding stone replacement can be effectively avoided.