Concrete block clamps could be used for holding variety of stone and concrete blocks, especially in operations of non pallet transporting and piling of concrete blocks, bricks, stones and so on. Structure with complete steel and high strength meets special requirements. Combination with self-lubricating is reliable and long working life. Separated side shifting designation ensures about 10mm shifting space remained on both sides when clamps is on any holding positions. Structural designation makes field of vision widely for operator. T-sliding part ensures high strength; perfect working conditions and keep long working life.