The utility model discloses a tansverse flow water clarifier for water processing belonging to the chemistry and metallurgy field. In the filtering process, the raw water travels through filtering materials to enter a central clean water chamber from a water inlet chamber in the perimeter of the tansverse flow water clarifier for water, filtering materials can reciprocally move from top to bottom, and the tansverse flow water clarifier for water can have a back-flush operation for filtering materials through the raw water and a filtering material raiser. Under the condition of not increasing the plain area, the tansverse flow water clarifier for water can increase the filtering area and the water yield per unit area and ensure the water-out quality and the water filtering quality. Filtering materials have a homogeneous load and a homogeneous sewage blocking ability, and filtering materials are lifted by the dynamic force threrof without an additional energy resource.