Phytochemicals, radical scavenging and metal chelating properties of methanolic extract of Senna alata were determined by various methods to identify the quantity of each phytochemical content present in the plant through standard methods. The phenol content of Senna alata extract was found to be (18.0±2.82mgGAE/g) while flavonoid was found to be (10.9± 0.0 mgQAE/g ) showing minimal amounts of flavonoid as compared to phenol. The total antioxidant in Senna alata extract was found to be (13.6±0.08 mgAAE/g). The percentage Copper (Cu²⁺) Chelation Assay of Senna alataat showed higher percentages at different concentration. The percentage Fe²⁺ Chelation of Senna alata  also showed higher percentage as compared with EDTA. Therefore methanolic extract of Senna alata leaves can then be a very  useful source of antioxidant for combating diseases that are linked with free radical and certain metals.