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Heavy metals, pesticides, fertilizers, and growing new pollutants, eroding the agricultural resources and environment in our country. In 2012, the national 863 program, launched the "agricultural habitat detection and repair technology research" project, led by the northwest agriculture and forestry university of science and technology. At present, has set up a file in the agricultural environment pollutants detection technology such as heavy metals and the new breakthrough. The project developed without immobilization point target nucleic acid adaptation of screening technology and the signal expression technology, combined with molecular agents and non immobilized point target SELEX technology, developed based on gold nanoparticles aggregation of resonance scattering signal expression technology, etc.