The utility model discloses a simple cooling tower, including cooling unit, gas passage, recovery unit, cooling unit includes tower body, ta gai, tower base, the tower body comprises two concentric cylinders of size, big cylinder lateral wall is opened has a plurality of heat dissipation through -holes, and the upper end of tower body links to each other with the tower lid, is equipped with the ring channel at the avris, and the ring channel comprises outer wall and inner wall, the vertical height of inner wall is less than the outer wall, and the through -hole lower extreme of tower lid is equipped with unsettled guide plate, gas passage inscription and tower body passageway body, intake pipe, outlet duct, the recycle -water export links to each other with the water tank through the recycle -water pipeline. The utility model relates to a simple cooling tower is equipped with a large amount of heat dissipation through -holes outside the tower body, improved the utility model discloses the radiating efficiency of cooling tower, the through -hole lower extreme of tower lid is equipped with unsettled guide plate, has improved the homogeneity of rivers, has improved the cooling effect of cooling tower.