Method for preparation of beer no containing carcinogen

The present invention relates to a brewing method of special beer without four carcinogenic substances of dimethyl nitrosamine, diethyl nitrosamine, nitrosomethylbenzylamine and aflatoxin B1. Said method uses the purified malt and auxiliary material in which the above-mentioned four carcinogenic substances are radically removed to make wort or adds edible enzyme and raw juices of plant, fruit and Chinese medicinal material containing anticancer subtances to make wort, and makes them into the invented beer (including dry beer, alcohol-free beer, health-care beer and fruit-taste beer) through such processes of fermentation and brewing.