Cardiovascular diseases occur due to the presence of by radicals which that are byproducts of metabolic pathways. The presence of these free radicals led to the search for plants that have antioxidant properties. Mixture of fennel and green tea was chosen to increase the flavonoids constituents. Combination both of fennel with green tea which, that contain high quantity of phenolics, flavonoids and alkaloids. HPLC analysis showed the high content of polyphenolic compounds especially Gallic acid (2351.62 μg/g) evidence that, the potent antioxidant assay. Rats which feeding on bad diet showed the best results in the group which treated with extract of 10% seeds of fennel with green tea comparing with control. Among the groups of the rats fed on fennel and green tea 9:1 slightly improved the liver and kidney functions of the rats that feed on high content of lipid and polysaccharides in serum, compared with that, group fed on fennel and green tea 4:1.