The outbreaks of food poisoning by clenbuterol hydrochloride residue occurred in Guangzhou were analysed. In 2001, 17 events occurred with 106 people poisoned. It was the most frequent (89.4%) food poisoning by chemicals in Guangzhou in 2001. In the 17 events, one occurred in mess hall with 45 people poisoned. Others occurred in families. The morbidity rate was 98% with no death .The result indicated that the meat market should be strictly supervised.