Abstract: Tomato,which is widely planted as an vegetable in the world,can be processed into tomato paste,canned tomato,tomato powder and other products. About 3% ~8% of the by-products are produced from tomato processing,its waste will pollute the environment. This paper mainly reviewed the utilization of by-products from tomato processing,including direct application in foods as food ingredients and extraction of functional constituents,such as lycopene,dietary fiber,seed protein and seed oil. Moreover,the issues concerning the use of the tomato by-products were discussed and analyzed.