The workers exposed to coke oven volatile are the risk population of occupational lung cancer than genera population. Polycyclic aromatic hydrocarbons (PAHs),a component of coke oven volatile (COE), are the species considered to be the responsible for this high risk of occupational lung cancer. One of most important mechanism of occupational lung cancer induced by PAHs is believed to be due to the accumulation of free radicals associated with COV and subsequent biological member injury caused by free radical reaction as well as decrease in cell immunity. Garlic is the consumed vegetable with a variety of medical functions.