BACKGROUND :- Colon cancer is known to be the third most deadly and fourth most commonly diagnosed cancer in the world. In this research we study the anti-cancer properties of the plant leaf extract of Tecoma stans. There has always been a need for anti-cancer agents, since the commercially available synthetic drugs have their own limitations due to undesirable side effects. AIM :- To analyse the antioxidant and cytotoxic activity of Hydroethanolic leaf extract of Tecoma stans in colon cancer cell lines