The utility model discloses a fluid distributor which comprises a fluid header pipe and a plurality of branch pipes, wherein the header pipe and the branch pipes are communicated, small holes are formed in the header pipe and the branch pipes, the header pipe and the branch pipes form one plane which is parallel to cross sections of a reactor and a tower. The pressure drop of air and liquid from an inlet of the distributor to outlets of the small holes can be enabled to be identical or approximate through the branch pipes and small holes with different diameters, the uniform distribution of the small holes can be guaranteed, and the flow rate of the air and liquid flowing out of the small holes can be evenly distributed.