The invention discloses an automatic cutting production line for ceramsite blocks. The automatic cutting production line mainly comprises a chain plate conveying line, a first cutting machine, a rotating stacking machine, a second cutting machine, a single-clamp stacking machine and a winding packing machine, wherein the first cutting machine, the rotating stacking machine, the second cutting machine, the single-clamp stacking machine and the winding packing machine are sequentially arranged along the chain plate conveying line. The first cutting machine and the second cutting machine comprise racks, upper saw belt wheel sets, lower saw belt wheel sets and a plurality of saw belts, wherein the upper saw belt wheel sets are horizontally and linearly arranged at the upper ends of the racks, the lower saw belt wheel sets are horizontally and linearly arranged at the lower ends of the racks, and the saw belts are arranged between corresponding upper saw belt wheels and lower saw belt wheels of the upper saw belt wheel sets and the lower saw belt wheel sets in a one-to-one closed surrounding mode. The upper saw belt wheel sets or the lower saw belt wheel sets are in transmission connection with first driving mechanisms driving the upper saw belt wheel sets or the lower saw belt wheel sets to rotate. By means of a unique cutting device, the cutting technology is greatly simplified, the advantages of the low noise and the good cutting performance are achieved, the labor intensity of workers is lowered, the working environment is optimized, and the production efficiency of the cutting line is greatly improved.