Food safety problem of animal origin is a public health problem widely concerned by the whole society. In recent years, Veterinary drug residue in food excessive events occurs frequently, long-term low intake of veterinary drug residue will lead to a variety of chronic, chemicals, and induction of human pathogenic bacteria to produce the problem such as drug resistance. The European Union, the United States and China's ministry of agriculture, etc established the maximum residue limits(MRLs) of veterinary d...