Currently, research on toxic and hazardous substance in food immunological detection methods focused on conventional enzyme-linked immunosorbent assay, especially relatively few studies Array Detection of toxic foods for electrochemical immunoassay method of harmful substances. The work to build a variety of stable performance, high selectivity and sensitivity of electrochemical immunosensor and applied to the detection of Sudan, clenbuterol and chloramphenicol and other foods toxic and hazardous materials. And for the sample of the large number of food safety testing, testing and testing required to have many kinds of characteristics such as age, photo-electrochemical immune sensor array was prepared and applied to veterinary drug residues in food in a fast, high-throughput analysis.