Fly ash, sand and cement are mixed together to produce fly ash bricks. The production of these bricks requires the use of automatic fly ash brick making machine that not only guarantees uniformity in size but also smooth finish. This results in lesser use of mortar and plastering work. The crack resistant bricks have high compressive strength, lesser heat absorption, high durability, less permeability, great sound insulation and fire resistance. This automatic fly ash bricks making machine requires only one operator to supervise the machine.